Come to the Midwest. Here's how we do it. First of all, you can't retire at 30 on an entry level engineer salary (poetic license taken). Second, there are no child care benefits.
Instead, parents with kids split things up. One parent (usually the one who was earning less anyway) dials down their career, perhaps by going part time. The other parent dials up, by competing for promotions. For instance, it's almost like clockwork that someone announces the birth of their first child, and shortly after that, they've become a project- or middle-manager, or they've gone to work somewhere else. A few years later, when their family life stabilizes, they might come back to engineering. That's what I did.
This is a known economic effect. More than half of workers will change jobs for higher pay shortly after their first kid is born. There was a study of unskilled single women in a poor neighborhood in Chicago. After adjusting for everything else, the ones with kids tended to work for higher pay, changed jobs more often, and worked further from home.
This is all pre-COVID of course, but is how things have worked for decades.
Is this a good thing? Well, it stratifies the career ladder quite noticeably. How do you make it so that people with kids aren't running the entire show? Likewise for society as a whole?
In my view, employer based child care benefits make about as much sense as employer based health care benefits.