Genetics isn’t destiny, but a lot of important traits are highly heritable. Consider for example the heritability of IQ. I can see why someone who considers him or herself a good specimen would want children more like him or herself than like the sort of person whose children are likely to end up needing to be adopted.
humans are an overpopulated and invasive species, there are millions of human children waiting to be fostered
Genetics isn’t destiny, but a lot of important traits are highly heritable. Consider for example the heritability of IQ. I can see why someone who considers him or herself a good specimen would want children more like him or herself than like the sort of person whose children are likely to end up needing to be adopted.