Yea I don't know exactly how to describe it.. I'm sure it's a bad position and it hurts to get pounded on but you are right he ain't KO'ed and he is up right after, maybe he knows he just can't get back up if they got him in those positions, maybe it's a mental block but in his prime, with experience, with age still okay, full of PEDs and he freaking quit he could have won a world tittle and do so much more but he quits, bad mental game, bad sub defense, bad if anyone reverse wrestles him etc etc.. it's not about the damage I think it's just some deeper mental shit with him.
While Brock who I'm kinda sure he wasn't punch much in the face growing up we all saw how he reacted when (big HWs that are pro at hurting people) tag him in the face, he clearly reacts very badly and he took tons of shit from fans because of it but you know what he didn't quit.. he had a 295 lbs Carwin on top of him with brick for hands going to town but he didn't quit... now put Chael in that position instant quitting.. it's like "he got me he is on top game over"... or freaking 4 and a half rounds riding Anderson and acting busy and all that just to mess it up in the end.