> after thousands of years of parents' raising kids without a third party involvement.

historically, the extended family like grandparents, are the ones taking care of children while working age parents go out to actually work (the fields).

Historically, this works, because you tended to live with the grandparents, at least for a while - the household is multi-generation.

The recent "privilege" of buying your own separate home away from your own parents, before having children, is new. And if these people aren't rich enough to afford child care, it's because they've overstretched - they ought to really live with their parents imho (and make sacrifices like the old generations did).