I don't know what country you're from (I don't want to assume), but as an American (and if it matters, a man without a child), I'd say that a big issue at play is the work environment. The expectation here seems to be that a salaried employee is either expected to work an arbitrarily large amount of time or that they'll be on call all the time for "important" (but in reality not terribly pressing issues). Vacation time in the US is pretty pitiful compared to European standards, and many people don't even use the vacation they have due to a fear of looking weak or not being a team player. Since salaries have stagnated, it makes it quite a bit more difficult to raise a family without both parents working (but maybe this is really an issue of consumerism).
Agree with you about the work environment however I have a slightly different take. This is personal experience so I can't say this is the norm but I found out something truly astonishing. Heres a little more food for thought - I worked for a large company & worked myself to the bone. I wanted to meet those high expectations. I travelled non-stop, anywhere and anytime. Traveling on Sunday was a given, no big deal, I was committed. Until of course I eventually burned out. I went to another smaller company that is husband and wife owned. This time I wasn't going to let them dictate my life and steal my me-time. I never give more then I feel is fair. I earn a decent wage & feel that I should provide the value back of what they are paying me. I do my job & I push back when needed. This is HUGE. I have been there 5 years and have never felt that I am under scrutiny for "doing less". I think often we BELIVE we must give our whole lives way. But maybe we don't have to. You just have to learn to say no and value yourself and your time enough to not let anyone else take that away.
I've heard this said elsewhere, but it really is true. Feminism has thus-far empowered women to be just like men in the workplace. In that we work ourselves to the bone for a faceless employer and don't have a lot left over for family or community. It's important to bring that balance back around to where men and women both can have the kind of work/life balance that makes sense to each of us, independent of gender.