No woman wears it for self hatred reasons. We love ourselves and want to enhance ourselves sometimes. By this logic whoever goes to the gym hates themselves since they want to change how they look.
If U go to the gym to change your physical body shape for beauty reasons yes you can say it's self hatred of their body also, if you go to the gym just so you are fit and your primary motive n intention isn't to change your physical body for beauty said, then that's health.
Each to his own I don't get involved in people's choices and free will and their underlying motives for it which I believe is self hatred of one self covered up with we love ourselves and want to treat ourselves well which is just masking. If U love yourself you wouldn't need to go such extent and just embrace your natural state.