Simpler than that, is the reality that she got a case of the Yips, and can’t just shake it off.
And in her sport, a screwup can result in a broken neck.
I'm not going to opine one way or the other on Simone Biles. She worked her whole life to get to where she was and then turned away and left before reaching the pinnacle. She has her reasons. She owes me nothing.