All this is never simple. Even if it seems simple to some on this thread, it may only be simple to you, right now, in your current circumstances.
No one has foresight.
Things happen.
The problem with exhorting women ‘not to give up their career’, or to earn enough to support themselves, is that the decisions in question might have been made ten, fifteen or even twenty years before, in entirely different social, familial and economic circumstances. Even more than thirty years before, if a fifty-something woman made a decision in her late teens to follow a particular career path that might have once been be creative and prestigious but ends up being badly paid, irregular and horribly precarious.
[My heart always sinks a little when I see a teenage girl heading off to study Fine Art, drama or even music. I love and value those art forms, but society does not reward those who pursue them.]
In terms of circumstances, I used to be very smug about having kept my career going, but a combination of circumstances (including a late-diagnosed additional need) has seen me become a SAHM in all but name in the last few years. What has astonished me was how un-bothered my high-earning DH (previously always very keen for me to work and contribute financially) has been by my career grinding to a halt.
I might have previously thought that my success as a working mother was down to my personal characteristics - I used both paid and family childcare, I balanced, I prioritised, I studied, I developed, I raced between home and central London - but perhaps it was all just circumstantial all along?