I understand that it's hard to distinguish between pushing kids hard to achieve, and abuse. The truth is that if you want to be a world champion, you are going to push very hard, and there will be pain, and it will help if there's a coach/mentor/parent/all of the above who demands more and makes you go when you want to stop.
Gymnastics, though, seems to be full of people who take that too far. It's not just that they have to work hard or train to ridiculous levels. It almost seems like they have to sacrifice their entire identity. They become these drones that exist for the purposes of brining fame to themselves but, more importantly, to the body of people who make their living by turning out those gold medals. They have to promise not just to keep to a training schedule, but to be obedient to their overlords.
The ultimate extreme in this is Larry Nassar. People complain, but they are kids, which means they are tools. They are the raw materials of this process. Their feelings and concerns are of no consequence. Their only job is to feed the machine that is their gym, their coaches, and ultimately USA Gymnastics. The abuser was part of the machine, and no one questioned him, as long as the trophies and, ultimately, gold medals, kept coming. This guy got results, so no one wanted to hear anything bad about what went on when he was working his magic.