Sure, but that's just shifting who is getting paid or when.

The person I was responding to said that people were obsessed with getting paid versus the social obligations.

I was explaining why people who would want to stay at home might be obsessed about payment. It's a question that must be answered.

You provide some potential answers, but for the vast majority of young Americans these days having enough savings to raise a child by themselves without working is not in any way realistic.

Even for the "have another family work" plan, for many a single income isn't enough to support 2 adults and raising a child. The economy just doesn't make that viable for a large swath of the country.

If you’re in the latter situation, find work that can done entirely compatibly with raising your family. Open a family daycare for other nearby 2-income households to use. It helps them and helps you. If that violates the premise of “without being paid”, so be it; I’m trying to be pragmatic not pedantic.