People as a whole seem to have an identity issue. We've mistaken gender specific roles for inequality. I would argue that this is a result derived mostly out of selfishness and pride. This spills out into lots of other territory, so I'll try to be specific to the question.
We've taken the idea that men are better at some things and women are better at others (generally speaking for both) and turned that into a bad thing. Instead of being proud of who we are and what we're best at, we've gotten this notion that we have to prove to each other that we can do (a) just as good as someone else can do it. No - in fact, we're better at it.
I'm by no means a male chauvinist, I promise. I'm a married man, and she works too, plus I do the dishes...lately I've really picked up the laundry too - we're a team, and that's okay.
Ideally...it's okay for a woman to be dependent on her husband to bring in the bacon. I say ideally, because neither 'side' really has it all together. Men leave their wives, for fleeting lust, money issues, freedom from responsibility, and a number of other reasons that point clearly to one's inadequacy and unfitness to be said husband. This puts us in a predicament where women NEED to be paid fair wages and have the opportunity to provide for their child(ren). It's a hypothetical, but I just want to acknowledge that the system of 'unfairness' isn't a perfect one in it's execution.
The main point is, we're afraid to be something. We feel like we have to be something else. In either case, where a woman wants to be free from dependency (financial or otherwise - I need to make it clear here that men, in turn, have several dependencies on the wife - and no, not just sex, or dishes), or the man wants to be free from his dependencies on her...or his responsibilities (that's one of manhood's specialties), we've decided we don't have to play our part if we don't want to. Do you know what happens in a play when someone doesn't play their part? It gets chaotic and all of a sudden you don't know who's who. There's a reason we have roles in plays...everything has to come together to make the production what it was intended to be (too allegorical?). There might be a certain...fascination with the main character, but nobody hears him/her if the sound is jacked up. No one sees them if the lights are off or fluttering about every which way because the light guy decided he should get to do what the sound guy does...but he sucks at it, he wasn't built for it. He's deaf. I digress.
I think it's an image issue. We don't have to be the same to be equal. In fact, we work better together when we're not the same. Feminism...at least as it's portrayed by most (self-proclaimed) feminists - I don't want to pigeon hole any reasonable advocates - is largely an attempt to address the result of a deeper issue.