I see both perspectives. As a culture that supports kids the US is way behind on maternity/paternity leave, childcare, leisure time overall, healthcare, higher level education. I see the increase in recent generations leaving religion has created a gap in social support, too (not sure how this maps to places other than the US). The US has a huge consumer culture for kids; suburbs are one way for kids to grow up, cheap toys and entertainment. Movies and entertainment have notoriously targeted PG-13 in recent decades because they're the largest audience (most free time and disposable income).

I feel like in the US a century ago there were incentives to have more kids; need for labor, childhood mortality. These incentives have gone away and disincentives have taken their place; women entering the workforce, educating children until their mid-20s before entering the workforce as a career, and little things like the costs needed to raise a child[1]. We haven't really changed anything to improve those disincentives and the results speak for themselves. People are having fewer kids later in life.

[1] https://en.wikipedia.org/wiki/Breeching_(boys)

I disagree, anecdotally, many of my peers with children recommend not have children and also regret not eloping.

Just try to tell it folks in bay area paying $2000-$3000 for childcare monthly.