These numbers are wildly improbable. A multitude of HackerNews in this very comment section assure me that having a child in the US is "financially impossible",

These numbers are wildly improbable. A multitude of HackerNews in this very comment section assure me that having a child in the US is "financially impossible", but the US is significantly wealthier than any of these nations on a per-capita basis. If it's too expensive to have children on a software engineer's salary, it's prima facie way too expensive to do it on a Somalian subsistence farmer's salary. Since HackerNews is never wrong, I can only conclude that these fertility rates are inaccurate.