You just committed the “cherry picking” fallacy.

You’re putting everything you don’t like in the mental illness bin. It doesn’t work like that. Mental illnesses are diagnosable conditions, not your personal pet peeves.

Someone who doesn’t understand how to eat properly isn’t mentally ill, they’re just ignorant.

Someone who does TRT to combat low energy, low sex drive, muscle wasting etc isn’t mentally ill, they’re addressing issues with a medically viable solution. It isn’t perfect but it isn’t “mental illness” either. In your make believe world, sure. But that’s irrelevant.