It's cool, Laura, you made a really good start! This topic has so many nuances, we could discuss different aspects of it
ad infinitum!
That dude who made all that money from those 'Men are from Mars' books is really annoying!

I remember seeing him on "Oprah" once, and all of these women were standing up and talking about probems they had with their men, asking for advice, and he was all like" Well,
you have to do this, and
you have to do that..." Which is kinda typical of men, as it's usually women that do most of the work in a relationship. He had no advice for their husbands...
What's weird is that, even though I come off as a liberal, tree-hugging new-age hippie sort, I have no problem with the traditional idea of marriage and family, in which the man is the bread winner and the woman, the homemaker. I think it can be a very rewarding way to live, especially for the children. But both partners have to be dedicated for it to work. If a woman wants to stay home and raise the kids, it's still work! You have to cook, and clean, and nurture. You can't sit around watching soap operas all day. If you're the man, you have to be responsible with the money and not lord it over your wife and use your status as the bread winner to control her. It's not hard to slip into bad patterns in that!
I had trouble with it myself because I was controlled financially, so I never got to make an independent decision. Also, whenever things got tight financially, I was forced to go get a part-time job, then was berated for not being home! I mean, excuse me, but you can't have it both ways, mister!

So it wasn't a good fit for us.
Like Laura said, typically men are physically stronger than women. And I do feel that women are very vulnerable during pregnancy and when their children are small. It's very hard for us to make it on our own, and we do need help! It doesn't always have to come from the father of the children, but it is very,
very hard to make it on our own at that stage of our lives. Men never have to face that. Many just walk away from the responsibility, or avoid it in other ways. I had a husband who worked while I stayed home when our son was born. But he was at work 14 hours a day! When he came home, he didn't feel it was his job to 'babysit' his own son, as he put it. After three months I had to put my son on formula. I was so exhausted I could no longer produce enough milk to keep him fed. There was no reason for that except that I was vulnerable and needed some help, and had a baby who never slept more than an hour at a time those first three months! I can't even imagine what it must be like for a woman who is on her own, with no financial support! Ack!
So I think that relationships between men and women, regardless of how traditional or how modern they might be, need to be there for mutual help--not just one person taking all the advantage while the other person just uses. I've seen both men and women be users, and it's devastating to the overworked partner, it really is.