Not exactly sure why this is downvoted - seems like a genuine question.

Here's a random Internet troll's theory (mine): there's a kernel of truth to the whole "patriarchy" thing. It's just that most men aren't part of it.

Hold that pitchfork for just a moment! What I meant was: the entire economy is controlled by a very small number of people. Most of them are men, and they have very particular preferences. Assuming the majority of them are straight, it would make sense that they prefer women they see as pretty, and don't care much about men. If anything, a good looking man might be a competitor.

I don't think this idea is completely nuts. Think of the few times in history when a woman had real power. For example, Catherine the Great. Who was suddenly promoted to positions of influence? Sexy men, her "favorites" (yes, that's an actual term).