To me, movies can be as inclusive as the studios want, as long as they’re interesting, fit in their genre and the directors are free to express their personal vision. Generally, choosing the characters also depends on the movie’s genre and its main audiance (would they actually do a plain Romance film for male to be more inclusive?).
Star Wars has always tried to be “family-friendly”, so Rey being the main protagonist shouldn’t be an issue. Take Blade Runner, though, clearly inspired by classic noir hard-boiled stories, and it just wouldn’t be the same movie if, for example, Deckard weren’t male, if Rachael weren’t Deckard’s damsell in distress, or if he didn’t kill Zhora and Priss with no mercy: nowdays, Scott would’ve probably been accused of being misogynist, and maybe WB would’ve deemed his movie too risky to be screened or even produced!
So being inclusive is not necessarily better for movies.