>>82177710Being tall and attractive is genetic. Women pick tall and attractive guys, they are picking genes.
Sure, a tall guy and a tall woman could produce a manlet, but that is unlikely. There are abnormalities like that in every species.
But even then, that manlet would carry the genes for tall children, and if the manlet had siblings, it is likely they would be tall like their parents.
If every person below 6ft tall was killed off, and everyone above 6ft tall was forced to breed, then the human population would become 6ft tall and eventually even taller.