I think its a bigger issue with the monetary cost and life cost of having children these days. Most people will struggle to have anything like the quality of life their parents enjoyed without kids and as soon as you add kids to the equation you can basically wipe out half your income unless you are a very high earning couple.
This is simply the price we pay as a society for making everything me first, allowing the cost of living to spiral out of control and requiring both people in a relationship to have a good job to have a good quality of life. Loads of people want a family, they just can't see how its financially viable or sensible. Then you end up with too many of the wrong sort of people contributing to the next generation instead of the ones you want doing it.
Would love to know how many people want more kids/a kid but can't vs those who just don't want kids.
Both cohorts are growing.
Some governments are throwing cash at it.. But looks like it isn't working anywhere really.