I don't think it is as simple as that.
An new way of framing how people think doesn't always work in a straightforward way.
Reliable birth control, the availability of antibiotics, and feminism combined to create an illusion that women could behave in the same way men do, both in terms of career, and reproductive choices.
Sure, it would say women should be empowered to reject lame men and find ones who want the same things they do (which could be kids.)
But that does not mean that all the women who grew up within the new framing are unaffected by the other implications. Often without really realizing that they were making important decisions on that basis.
I suspect it's not a big part of human nature to sit down and plan things like this out. In 10,000 years of evolution, it's never been necessary. If you had sex almost certainly you would become a mother, so most fertile women did in their late teens or early 20s at the latest.
Once we were properly humans and established enough to give up some of our reproductive capacities, there has sometimes been an option of celibacy and a differernt life focus, but that hasn't been chosen by most even when it was an option - most people don't want to be celibate, at least not enough to be vigilant about it which is what it requires.
People have not had to sit down and say, well, lets make plans to continue the species. Babies came and societies developed social norms to make sure they, and their mothers, were cared for.
Young people now probably aren't much more naturally inclined to make plans for all of that. If social prompts don't encourage it, some may find they get caught up in other things.