It's because it runs like a business that we're able to enjoy a high standard of living.
If the economy stops growing, or worse, degrades, everyone will suffer incredibly. Job loss, investment loss, higher cost of living.
There's a wide gulf between childcare for none and childcare for all.
I'm an atheist, but some of the cheapest childcare is at churches. Orders of magnitude cheaper than private childcare because they already have the infrastructure for it. I've had affluent people turn their nose at the idea of Christians watching their kids. But there are entirely affordable options if you're not being choosey.
I don’t understand the conjunction of “the state should not subsidize childcare with taxes” and “the church should subsidize childcare with underpaid labor and tithes.”
The economy will stop growing eventually. Nothing grows forever. If we have built our society around the notion of perpetual economic growth, we have already accepted that "everyone will suffer incredibly", and we're only arguing about which generation will be the one to bear it.
The government does not need to be run like a fucking business.