Why question a human’s innate desire to raise their own off-spring like we’ve evolved to do for millions of years?

So often people chime in with the “just adopt” and while I agree in a perfect world, that’s exactly what would happen, but in reality it goes against a very fundamental part or human nature to opt to raise someone else’s child instead of your own. It just completely misses the human element of why people are so naturally driven have kids and families to begin with.