Earlier quoted context omitted.
I think you're missing the point of the "childcare is not part of the workforce" argument. It's not that it isn't work, and it's not that it isn't important. It's that, in many cases, the economic comparative advantage for the (often) female caretaker of those children is not being fully utilized. That is to say, caring for a child is a service that costs X. But it is being performed by a person who's skills are valu…
Why is subsidized daycare necessary in these cases though? In America if daycare costs X and you earn Y much greater than X, then obviously you'll make more money going to work and sending your kid to daycare than being a stay at home parent. The people who choose to stay at home often either have multiple kids (higher X) or earn little enough (lower Y) that it's not an economic advantage for them to work. But those…
I think subsidized daycare is a great idea as long as it isn't too much of a disincentive for those who want to stay home with their kids. When I was looking into childcare I noticed there were a lot of options that were only 2-3 hours a day. It took me awhile to realize these were breaks for parents who stayed at home and they were not targeting parents working full time. The parents I do know that have stayed at home could really use and appreciated some reprieve here and there. Nicer gyms and even grocery stores offer temporary childcare. I'm confident there are fewer options in middle/lower class neighborhoods.
Most people I know who chose to stay at home have only one or two kids. Even for those who have, say, five kids I wouldn't say it would still be a net loss to the government (many regulations mandate 1:6 caretaker:child for pre-walkers to 1:15 starting at age 5 for childcare). There are other advantages to group care like being able to spot issues that aren't age appropriate. As a parent I don't have a large sample size for most milestones. "Normal" can have a range of a year for many developmental skills, but others can stick out in a group setting. Spotting these things early can go a long way in addressing them. Scheduled pediatrician visits are only once or twice a year and last ~30m. So many things can be easily missed.