@RobinLFC
I think you’re perhaps misunderstanding mental health to some degree. It’s a constant battle, a tug of war between whatever the mental challenge is and being able to cope with it. 99.99% of the time you’d never even know if someone has a problem. I’m sure there are many people you know who suffer mental health issues which live perfectly normal lives, and you’d never know. Sometimes what tips you over the edge is something that accumulates and builds over time. None of us know what her underlying issue or cause is, but we should be very careful to presume it is related to pressure of the games. It might be what tipped her over the edge to pull out but the issue might be bigger and completely unrelated. In some ways, you could add a perspective that it shows incredible mental strength to admit you’re not right to perform knowing the whole world is looking at you. And if the issue is something more fundamental and underlying then it’s amazing she has achieved what she has already.
I get what you’re saying about other athletes. But perhaps they don’t have whatever underlying issue Biles has been grappling with. Something tells me, and of course just my view, that whatever it is, it’s more than just “couldn’t hack the pressure”.
I don’t think it takes away from her greatness at all. Some might say it does, but that might be ignorance to actually truly understanding mental health.