So just to be clear,
Your points are,
1) going through a life threatening illness twice that requires two MAJOR surgeries, one of which at least involved removing a large portion of a persons colon has no bearing on your ability to win a cage match against some the greatest fighters the planet earth has ever seen.
My point is quite the opposite. Of course it affects fighting. It doesn't affect ACTING.
2) there is no evidence that people who do choreographed acrobatics and work on their physique for a living in order to entertain arenas full o people with matches that can last up to an hour have good cardio
Actually, no that isn't evidence they have good cardio, as actual fighting measure cardio. There's a LOT of rest time in those choreographed fights, rest you don;t get in a real fight.
3) the simple fact that several participants from both mma and pro wrestling have interchanged promotions is not relevant because you decided pride doesn't count, because it was in fact, too similar to pro wrestling.
You got several things wrong on that one.
I decided not to discuss Pride because there's no way to know how many of their fights were fixed.
'several participants from both mma and pro wrestling' have NOT 'interchanged promotions'. Several people have gone from mma to pro wrestling. ONE has gone from pro wrestling to mma with any success.
4) and lastly, that here is no plausible reason to relate pro wrestling to mma because of above points
I've done mma, amateur wrestling, stage combat and stuntwork. I'm also a longtime fan of professional wrestling. (I like seeing stuntmen get paid.) But mma and professional wrestling is literally the difference between reality and pretense.
If you find that radical, check out Wonder Bread. The real world has some amazing stuff.
Then again, if the threads all in fun, I'm sure Roger Federer would do well in mma. Tennis players have great cardio.