Mind control can't change your sex (or just make it feel better, with fast recovery), make you live longer, or help out when you're having a rough time on the toilet.

It just turns everyone into your slave. You're a villain by default.

More importantly, it's super boring. People with mind control powers can have whatever they want—materially—with basically zero effort just by forcing people to give them stuff. There's no struggle, and if there is any, it's just you sweating or getting a headache while staring off into the distance.