Some people have no support such that you describe, and are entirely out of pocket for childcare costs because they have no family to rely on (either due to apathy, or death). If your spouse is a stay at home parent, none of these costs are tax deductible (US centric).
I am aware of that. My wife was working part time and had to take vacation days to stay home. I was working full time for FAANG and had to take vacation days for paternity leave, too. I stayed home for 3 weeks, the most I could take. There was no such thing as paternity/maternity leaves prior to 2016 I believe even for big tech companies. I remembered Microsoft was one of the 1st to offer such thing in 2017.
