Tom - it is a false dilemma because people work / don’t work in all kinds of configurations.
Another false notion on here is that if you don’t return to work within a given period, you are “financially vulnerable” for ever. Well, this may be true in many cases, of course, but there will be just as many cases where it’s not true at all.
Women are not stupid. I live in an area where most of the women are SAH for long periods. To be blunt, it’s an area of London where there’s a lot of wealth and they have husbands who are very high earners, even by London standards. These women are all highly educated, confident and articulate and could walk into a job, but they have the luxury of choice to be around for the DC. They take things on regarding the kids that they wouldn’t otherwise have time for. These families have busy lives and tend to do a lot. They become very involved in their kids education as competition for schools is fierce in this area and quite unlike anywhere else in the country. It suits the DHs who tend to work very long hours and travel a lot. They have no need to use childcare, though some may have a live in nanny as well.
These women are hardly drudges at home. They have full access to family funds, properties and investments - there is no question of this - and they know where they stand in the event if divorce. The point is, even if they were working, it would make little difference to the overall family wealth. SAH just means that life is smoother and everyone benefits. If they want to go back to work, they do just that. If they can’t, because they’ve been out of the loop too long, then they retrain. This happens all the time.
Obviously, this is a very privileged position to be in, but like do many things in life, money buys choices. It’s no coincidence that there’s a preponderance of SAHMs in areas like SW London. None of them would recognise the portrayal of them on here as bored or vulnerable, etc. It’s precisely because they are are not bored or vulnerable that they can make the choice to SAH!