Yeah, as soon as you don't need children to help with your work, they don't make much sense in the capitalist individualistic society. That women still choose to do it, honestly... I see as a triumph of the human spirit
It's worth pointing out that pre-agricultural hunter gatherer societies also had low birth rates. They spaced their children out more, nursed longer, and didn't have as many kids overall.
Their population densities in pre-agricultural Europe were far lower than the agricultural societies that displaced them,
In an agricultural economy, children are an economic assistance, a source of labour, and a means of helping with survival.
In our industrial/service capitalist economy, while they are a net good for society ... they are a cost centre for the parent.