I think it will be most helpful to you to avoid your own overreaction and stress, and gain a larger perspective, if you approach his response with curiosity. Try to understand what is underlying his resistance, and then put it in the larger context of ANY resistance to corseting in society and throughout history.
Did he really 'discuss' your corseting program with you? I assume that at this time, he really does not want more facts to dissipate his concern, but has already made up his mind to a fair extent. Unfortunately for him, his position seems to be based not upon facts, but rather upon emotion.
Remember that sometimes people change or ease up a bit when they get more information over time. In your case, likely these facts will have to come indirectly and not directly.
I can assure you as you likely know, that people who have never worn a Corset and never studied its effects, frequently STILL have this bad impression of the results. I have pondered the reason for this bad impression for years, and come up with some theories but they are of course, only theories.
The first is the media: the media continually portrays corsets as painful. Withness the mother lacing the daughter into her corset in The Titanic. I believe the daughter is grimacing and certainly, the scene is set during some conflict between the mother and daughter. Ergo, the corset becomes Associated in the viewer's mind with pain and conflict. Such a scene 'sells more newspapers' so to speak, to promote extremes that get audience ratings, as it were.
Second, for a reason I have yet to fathom, human beings have a tendency to visualize things to the extreme, if not do them to the extreme. Look at XFL extreme football so popular now, after the regular football season is over. Look at the Extreme Olympic events (skydiving with a skateboard on? Skydiving tennis? The Iron Man/Woman?) If we see something we don't personally experience or understand, somehow our imaginations jump to the fartherest extreme. We do so until we become more rational when we get more information, usually, barring any other emotional content. Perhaps it is our 'cowboy' history and mentality: taming the Wild, Wild West so to speak, that is part of our American heritage, particularly in the West. We admire the larger-than-life Paul Bunyans. Or perhaps our irrational fears just best us under some circumstances. It is quite a curiosity to me, and perhaps you might be able to shed some light on this phenomenon.
Third, remember that corsets create a visual image that is quite foreign to most people. We are coming out of a period starting with Women's Liberation in the late 60s, of free flowing, deconstructed garments. The 90s were particularly a throwback to that period in general, with the exception of the late Swing Club Kids falling back on constructed 50s fashions (but that is a younger group primarily). If we have been subjected to fashion and social media that promote a non-corseted waist (unless it is in painful circumstances), there is no social approval to encourage corseting.
Fourth, corsets also create a dramatic image that belies their comfort. Nipping the waist in two inches to most people, looks like five or more! The other night at a social gathering, I was wearing a corset with NO Restriction at all, yet I had people come up to me commenting on how small my waist was! The point was, I HAD a waistline albeit a natural one that night, which is more than many women or men have these days, so it was noteworthy, even with NO reduction! And my corset was just plain pretty!
When I go down 3 or 4 inches, people are convinced I am in agony and measure 15"! I have had people ask if I am corseted to 15". Not in my wildest dreams of course, (more like 19 or 20") but visually, to them, I am! So it is a visual illusion that tricks their eyes, and perhaps the eyes of your husband. They usually of course, do not believe this illusion when described to them, until they try one on!
Fifth, as said, getting facts sometimes only comes from trying a corset on and feeling how supportive and comforting it actually can feel. I have seen this time and again over my 11 years in business. A doubting Tomasina lady comes in the store protesting against corsets, tries one on and is usually hooked....or laced!
Unfortunately, if your hubby is a manly man, he is unlikely to be willing to do that, or put himself into a place (my home for example) where he could do that and gather more facts from an otherwise rational and educated person....me! :-)
Sixth, I find the medical professions particularly stubborn re: corseting. For docs this is clearly hooked up with wanting to maintain power in the medical profession. They want to do the prescribing of back braces, they want to get the profits from the sale of medical devices, not gorgeous corsets sold by another 'business'. And let's face it, medicine like every other profession, is a business bottom line as we all have to earn a living somehow.
Your hubby may be squarely in the middle of this profession in a medically-related field. So his colleagues and his professional milieu will not traditionally support corseting. He will likely find reinforcement for his opinion and not your experience, among his colleagues.
I'm fairly sure that firefighters, police and EMTs wear kidney protection belts. So do UPS men, Post Men, and those gorgeous hunks who exercise daily to sculpt their bodies in gyms all over America! With corsets we are doing nothing less than the same. But this paradox may well escape men who 'protest too much' because they refuse to exercise their reason!
Seventh, corseting emphasizes the female shape and renders us 'visible' to the world in attention-getting ways. This could raise in some men, subsconscious fantasies of losing control and losing....us, you, etc! If your hubby has traditional approaches to women then he may feel threatened at you becoming a more upfront, sexual being in your 'look'. You will be attracting favorable attention from other men, his imagined competitors.
This is likely a subsconscious reaction, not a conscious one to which he could ever own up. Some men find these public responses quite gratifying, and support their women in corseting, because they bask in the glory of knowing that your beauty is really "all his", since he is your husband or man! He has "won" the corseted beauty, and not the onlookers! But some men do not see it that way. I have no idea why some men respond this way and others that way.
Eighth, because of his resistance and your continuing with your own priority and corseting program, you are wittingly or unwittingly, testing his power and control in your relationship. At base I truly do believe that his and any man's resistance to women corseting involves a matter of power.
Again, I feel it is mainly subsconscious and not designed to hurt you. I do note that he says that you are not respecting his opinion. However, his true reason is likely deeper than that. But it is not likely to surface, and therefore he is not likely to re-focus on fact rather than feeling, through any kind of direct confrontation or approach by you. The bottom line is, you just can't give him facts if he doesn't want to hear them!
I'm sure you know best how to approach this issue since your know your husband. However, from someone who does not know, it seems that best for the moment is NOT to try to bring him around to any position other than what he holds at the moment--do not even try to bring him to a neutral position!
If he sees that you remain happy and healthy, and that you do not dramatically change your shape, he will perhaps begin to understand that this is not an extreme program you are on, but a moderate one that primarily has health as its basic tenet.
Try to keep the perspective of curiousity about his reactions. Do not let it convert into stress or anger or resentment for or by you in response. Just ask yourself when he makes any negative remarks:
"Now, I wonder what is motivating him to make that remark; it is a curious remark indeed! Let me think if I can get to the bottom of this. What other possible reasons could he have for making such an emotional remark to me."
And maybe you will gradually begin to understand more about his personal response.
Finally a word about "doing it for me": While Training Buddies and Coaches and supportive hubbys are great and helpful to some people, you should be doing it for you and you alone. And of course you should always exercise your own best judgment, as always, and as I know you will!