hmm, I think that the health point is one not to be underestimated.
i work pt (but significant hours, and aiming for ft asap), because I gave up my job to follow dh's.
before that I was working ft. after having dd, I was just chronically ill. not acutely, but just all the time. I was exhausted. my body did not cope well with pregnancy/childbirth at all.
you just can't be signed off work for a couple of weeks here & there, then get yourself a promotion/payrise. every time i try to push myself to do more - i get ill. whether that's work more, or go out more, or just go to the gym etc. there's a certain amount i can do, then I start getting mild coughs/colds/stomach bugs. ignore it, and it gets worse etc.
I wonder how many other women find that having a child (or children) does this to them? it's not a life event that men ever go through, so will never affect their stats. although i don't think women should have to take time off when they have kids, i do think that for a certain proportion of them, probably need to.
For me, we had a load of fertility treatment, then an awful pregnancy, then I was ill for the next few years. Basically, having dd knocked 5 years out of my career. When dh was offered a job in the US, I gave up my work, and moved. I am now re-starting my career from the ground up.
And I have good qualification, love my job, enjoy the hours, and am good at it. there is a career structure to follow. if i was in a lower paid, 'job' rather than a career, would i bother with all the stress of working? probably not.
so, xenia's exhortations that we should all get out there, aim high & work hard are kind of correct - but they just don't allow for the ways in which people can be held back, not by their own mental blocks, but other things.
And we can't ALL be in high-flying careers. Someone has to care for kids/sweep the streets etc. How should we fix that?