Some of the highest birth rates are in relatively quite poor countries. https://worldpopulationreview.com/country-rankings/birth-rat...
Comparing the affordability crisis for the middle class in the US to that of historically poor developing countries as it relates to birth rates is not a very good argument.
It might be somewhat comparable a decade or so from now if we keep letting wealth inequality run away at current rates, but it isn't right now.
Developing countries don’t care less about their infants, how can you think that?
This phenomenon has many many causes, and does not represent any statistic on a parents caring for their kids. It is ludicrous you would think so. Please provide at least one study that shows some form of causality.