Why Are Our Kids Being Marketed A World Where Mostly Only One Type Of Human Is The Hero?

Hollywood creates worlds where there are aliens who come to Earth in giant spaceships, where average people can turn invisible and fly through the air, and where raccoons-with-an-attitude travel through space. Remind me again why it can't make a world where our heroes are just a little bit, um ... different-er?**Don't say box office profits. The fan bases of fantasy and sci-fi are insanely diverse across all spectrums and you know it, Mr. Hollywood Exec Man!