Seriously, often, they (men AND women) just CAN'T. It would mean leaving the role together, and some are actually very valuable to society you know. Surely you can realise that with some jobs the hours are COMPLETELY irregular, the work goes on till the job is finished,there is no option to be part time, it is exempt from the working time directive, travel across the country may be required at a moment's notice and it may mean a couple of days away......etc etc. These jobs do exist, you know. It doesn't mean to say they are in the private sector so come with a huge salary to pay for a nanny either. The divorce rate is high for the role my DH held for many years and there aren't many women in the role as most want children and well, it really wouldn't work unless you had a FT nanny and were prepared to see little of your child. DH was warned about the high divorce rate when he first applied, and there was a really strict application process which actually mentioned that fact, and the strain on family life was discussed at interview, so we had to really think carefully about whether he was doing the right thing, and how we would manage childcare when we had children. He had that type of role for many years and there is no way on God's earth that I would have been able to do a teaching role, or even work FT. So instead we decided together, weighing up earning potential and family income, that the solution was for me to be the main carer. I was a SAHP for 3 years, as was affordable back then but it isn't now so god knows how families manage who have someone in that kind of role.
I hate how the cost of living (housing, mainly, let's face it) has restricted choice for many families. Why building societies were given free reign to hand out sky high mortgages I'll never know. When we bought our first flatin the late 90s the guideline for the amount lenders would let you have were 3 times a single person's salary or 2.5 times a joint one, or somthing like that. There should have been strict maximums on mortgages, according to income, and ability to pay the monthly cost on just one income if need be. People overstretched themselves and prices have spiralled ever since and there's no contingency plan for many families if someone gets ill, or they have a child with needs etc.