That sounds more like "hormone-driven people don't know why they had children".

Eh, that argument works on any claim and is nonfalsifiable-ish, so I think it can be ignored.

People buying more chocolate ice cream than vanilla? Could be changing preferences or Hersheys marketing, or it could be undetected brain worms. People voting for one political party over others? Could be that party is campaigning/governing in a more popular way, could be brain worms.

If there’s evidence of contaminants or whatever influencing behavior strongly enough to change large scale demographic trends, then present it. Otherwise, your best chance at good data is to take people at their word when they say why they do things.

both points are fair, but operate at different levels. the former: willpower. the latter: constraints.

and, the latter is indeed dependent on the former. but, arguing that humans have no free will is an argument that should be tried independently of rebutting the former comment.

yeah make sense, we do things, rationalize them later, i get it, i certainly am sensitive to it.

People are very conscious that a child costs a lot to raise and the reality is usually worse than their estimates. They know children will impact their career and promotion opportunities, so a lower expected income just when they need it more. They know they no longer live next to their parents so the support structure they have in place is flimsy.

You make a philosophical point while the reality is already clear enough. Everyone has a friend with kids so they hear the stories. The “scary” ones stick longer than the nice ones because it’s easier to understand financial woes, health issues, and problems of this kind.

Okay