6. Changing norms have greatly increased what is expected of a parent raising a child. Ignoring external cost increases, this has profoundly increased the cost and time investment to having a child.
7. Economic changes (e.g. 30 years of wage stagnation) all but force a family with both parents working, meaning parents have to work, and then thanks to #6, also do more at home.
So parents are expected to do far more with far less, with no support from family, community, or society.