Definitely a bit hypocritical of me, since I'm also a part of the problem who doesn't want to have kids. But, at least for me, it's not worth it right at this time.
Interesting. In USA fertility is tub / U shaped [0]. Filthy rich just hire nannies and bang away and dirt poor have none to negative opportunity cost
[0] https://twitter.com/theHauer/status/1222514313723875332/phot...
Even by just looking at my surroundings, I have some friends who make decent money, and they're still on "no kids" train, even though hiring 24/7 help would just cost them pennies.
Near equal (higher) fertility at both extremes might be, but not proof of, the hypothesis the dirt poor and filthy rich are the fertility rate you get when opportunity cost looks near 0.
A bucket you often see stopping at 300+k imo far too low as the lower band of that is usually high stress highly educated long hours professional and small biz owners who have insane opportunity cost to have children.