That's a weird contortion of logic. Your point is still that raising children isn't an economically valuable activity, unless you also think that men should be paid somewhere around 2x if they are supporting a stay-at-home mom...
The existence of daycares is proof that people are willing to pay for raising children.
What you're hitting on is that staying home to raise 1-2 kids is economically inefficient compared to working and sending the kids to a daycare, because the daycare can benefit from efficiencies of scale.
