It’s said pathogens
Have one aim; to reproduce.
We no different.
n.b. Dress life up as we might, but without children we have no legacy; we die out as a species. All we do has no meaning without the generations that follow. We are otherwise just marking time.
The sociability of humanity is how we ensure that children can thrive so they too can mature to take up the task of reproduction. It is an inclusive process.
Cooperation not competition.