What's healthy and mature is learning to cope with the fact others are different and not judging others based on those arbitrary differences or forcing them to conform to your expectations of them.

Oh, absolutely that's true, and I hope I didn't imply otherwise. It goes both ways. What's healthy and mature is learning how to meet people where they're at and avoid conflict. Sometimes that means overlooking things that make you uncomfortable, and sometimes that means being mindful of how your own appearance and behavior can make others uncomfortable.