You know when people say they are doing something for themselves, I mean like having surgery on their nose or saying they wear certain clothes for themselves, AIBU to say that they are not at all?
If they were on a desert island alone they wouldn't give a shit about whether their breasts or nose are a particular aesthetic. If they lived in a different world where those things didn't matter they wouldn't feel it would boost their confidence or whatever. Of course it is for other people and how they are seen by others.
I don't mind if people want to wear very uncomfortable underwear or cut parts of their body off but don't make out it's nothing to do with society and all for yourself.
Sadly it's mostly women who wear uncomfortable shoes and clothes and fill their lips with crap etc.