Well, I qualified my stance to differentiate the difference between sport methods, what you propose; and the traditional martial art method. You cite factually proven. I can cite TAM'rs who have different experience, including myself.
So you say some "first" social psychology studies 'factually" proves so. I guess a social psychologist is then who you should hang on the wall of your dojo.
Here's a sample of my kind of study:
http://www.tkdchungdokwan.com/files/TkdStudentManual2012.pdf
This one has pluses + minuses. Theres' quite a variety among traditional karate manuals, given the numerous styles and orgs. within styles. Quality is all over the place, some cover or emphasize this, others that. Hey, there's even social studies content in there too, like rules for practicing the art, and codes of conduct.
We have some commonality on objectives, some difference. Difference in approach. For one, the styles of Shaolin kempo and American kenpo are much more sophisticated TMA styles compared to my rather basic karate style. The bane of these styles is that they are of such higher level and complex, is practitioners fail to access their higher strengths and effectiveness.
So practitioners and this is true of karateka as well, go to the active kumite to learn, as you clearly propose. I'm mean look at how Stephen Thompson fights in MMA, or his kickboxing full contact. It's almost nothing like the kempo he claims to have mastered (3rd degree?). Look at his MMA training, it's kickboxing done rather poorly at that. When the high pressure was on with physically daunting MMA opponents, he crumbled.
This is why I train a much more basic karate like Shotokan, but not Shotokan. It's so much more doable than kenpo, yet very difficult compared to MMA sport training. Note however, as one approaches the black-belt, the techniques in my style begin to assimilate somewhat of a kenpo nature. Not really kenpo, not that sophisticated.
What I think is very interesting on this forum is to see how Simon, that Kyo Greenbelt progresses. I saw you guys started a post regarding the flinching, which I just commented upon. HHHmmmmm.