Because most men (American men at least) seem to prefer marrying financially dependent women. So if a woman wants to get married, she better act dependent, like "oh I need you so".
Of course I may see things this way because I'm one of those cynical financially dependent women who are in great shape and great job but can't seem to find a fitting dude. Seriously, many (not all, of course) dudes complain about women taking their money but they go for the ones who do take their money and leave the financially proud ones in the dust. Does that make sense?
Oh and, please stop bitching about feminists taking your money. Real feminists are for equality, you are bitching about gold diggers. know the damn difference!