> I'd bet that that isn't a "choice" so much as it is that millennials are prevented by their circumstances from having the children they'd want to otherwise
Taking a look at median incomes and housing costs across the US, I'd bet that millennials have become forward-thinking enough to plan for kids, but have gotten themselves worked up into thinking they must spend millions on getting into the best daycares, have separate rooms for each of their children, a guaranteed spot at university, etc.
Genuinely seems to me the decently well-off "involuntarily-childless" folks are worried to be committing a human rights violation by bringing a child into this world where they go to the public school they're zoned for. Or it's just cope and they are worried about reducing their living standards even just a little.