Nobody forced them to use the TOS crew. They could have invented a new crew with more women, homosexuals, Muslims, Aborigenes and everyone else who feels underrepresented in modern media.
And exactly who would have wanted to watch that movie? People wanted a movie about Kirk and Spock and the TOS crew. .. the writers can put Muslims and homosexuals and aborigines in the next movie, since they've established a base with which to work. . .