Your last point seems like it should be a function of market demands. If people wanted to see women talking about something other than men, those movies should dominate at the box office. Since women buy more movie tickets than men[1] and thus movies will be generally catered towards that demographic, if there is sexism at play here, it seems like it is coming from the female gender themselves which brings up a whole new set of "what's going on here?" questions.

[1] http://womenandhollywood.com/2010/03/11/guess-what-women-buy...