you need to learn more before attempting to sound intelligent.
you said smart people are more likely to have kids than people who only care about themselves.
you tried to use that as an argument to prove that having kids is a
smart thing to do.
but your logic fails. the first sentence, if true, only tells us that the group of smart people dont have some kind of smartness-related deficiency in reproduction. it says nothing about a correlation between reproduction and intelligence.