This is something that has been proven time and time again for many years, although I'd say it has more to do with biology then psychology. Women generally are not attracted to nice guys.
I agree with what you said Cho about men and women being equal or at least especially in the 21st century where women are capable of earning just as much, if not more money than men. However, being equal has fuck all to do with the laws of attraction. The issue isn't about equality it's about gender roles and stereotypes. If it weren't, more women would be more inclined to date men that didn't have jobs or had little paying jobs the way men are, or would be more willing to pay for dates or be more sexually aggressive. Regardless of "the emancipation through the work" women are still seen a certain a way and men are still seen a certain way and women still want a certain type of man that fits into what they constitute as being a "man" and it's even perpetuated by half the guys on this board. This won't change until gender roles have been totally broken down. Equality or autonomy has nothing to do with that, nor is it about trying to keep women under control. Women don't want a dependent man and they don't want a pussy.