> Maybe it's time to start thinking why people who end up living in the West are unwilling to reproduce, despite having the highest standard of living ever available to humans.

Not "despite", but "because".

In an agricultural society, you need lots of children because you need a lot of hands working the farm. If you're dirt-poor in an industrial society, you need lots of children so they can all work in factories to earn money for the family. In any society with a high infant mortality rate, you need to have even more children because you can expect a lot of them to die young.

In the modern West, we're not subsistence farmers or dirt-poor factory workers, and almost all of our kids survive to adulthood. We don't have lots of children because we don't need to have lots of children.