Having diverse characters in fiction can also help traditionally privileged people too, like white men. Maybe we’d have less sexism and racism if we expose people to this early.
Doctor Who had been diverse, it had characters that were black, women, gay, it even had two black female characters.
Look, I don’t think you’re being a sexist pig. I think you’re just extremely rigid in your thinking and the fact that you can’t accept a fictional character changing is the problem.