We still have (for now, though even this is under threat) good access to contraception, good sexual education, relatively low child mortality rates, etc here in the US.

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.

Quite poor countries can plop out an infant and literally do not worry of him ever again. So much for buying him stuff, education, care...

The reason is very simple, contraceptives.

Developing countries don’t care less about their infants, how can you think that?

Ask UNICEF if it's not a problem https://en.wikipedia.org/wiki/Street_children

Read the paragraph about causes maybe.

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.

lots of developing countries have way stronger communities. in these places you can raise your kids in a more "free-range" style and nobody will give you shit about that.

agreed, they collectively care more, would be my view. In many neighborhoods in the US, people only care about themselves, no one else. They don’t even know their neighbors.

way easier to raise kids when you have a clan/family around, and they generally cost a lot less money/attention.