I knew someone was going to say this, and yes there are some MT fighters that train boxing also and have accepted its usefulness. I'm absolutely all for that.
I'm talking about non-acceptance by the MT sport and training community as a whole, not just some of them, some standouts who elected to cross-train it on their own are not enough. The prevailing attitude from MT trainers is that boxing training is redundant and the more technical aspects of boxing are not applicable to MT so they shouldn't be trained. I think they're just threatened by the possibility that something useful is out there that they don't already know, which is absurd because that's true for every coach in every discipline.
It reminds me of when BJJ professors say that striking is obsolete and that wrestling isn't necessary. Their BJJ groundgame encompasses all of fighting perfectly. It's pathetic and most people are smart enough to see right through it without an intense dissection of the clear results.
I'm not against MT or anything like that, it's just the stubbornness of larger part of the community to accept that they don't already know all the useful parts of western boxing just because they put gloves on their hands and "allow" punches in their curriculum, and their refusal to integrate basic-intermediate boxing concepts into MT itself beyond their already incorporated sloppy basics. Like I said, it WILL change, but at this rate it will take another 50-100 years