Earlier quoted context omitted.
This analysis is incomplete for a couple of reasons: 1. any universal childcare scheme will involve groups larger than the median at-home familial group. Avery is watching ~1-2 kids, but if those kids are at creche, they are in a group of (say) ~4-5. 2. In much of the country, a) is financially out of reach for many couples due to cost of living generally being based around two-income households.
4.5? At a US daycare those kids will be in a group of 20-40, with one or two adults supervising.
My daughter's at an in-home daycare with IIRC five or six other kids. There are two adults there full-time, sometimes three.
Two adults supervising 20-40 daycare-aged kids is simply not feasible.