I think there’s a middle ground where in the US many people would be having kids around 30 if they could afford it. Our recent past reflects that. Even the number of kids have been reduced as the cost has become too high, so it’s not parenthood or responsibility alone people are avoiding. Comparing to poverty situations introduces a whole plethora of variables. Kids are seen more as assets than liabilities, as they will care for you in old age and/or can contribute to the household after the first dozen or so years. This is not really a comparison to the rich nations.