Hollywood needs money, like all business. The quickest, most effective way to force change is to hit them in the pocketbook.
How has that worked out for Hollywood to date? The number of women in movies has declined in recent years.
And just because a movie isn't sexist doesn't mean it's a good movie and vice versa.
But we shouldn't have to force change. Any right thinking person must know that these movies should be more representative. I don't believe that writers sit around a table and say, 'There are too many women in this script.' I think their default setting for any supporting character is male and making them female is usually an afterthought. We just have to make them more aware of what they're doing.