Eugenics is a system of controlling reproduction. Many eugenesists may have believed that being a member of a certain race or having certain congenital diseases made one inferior (and thus unworthy of the right to reproduce), but the basic principle some people should reproduce and some people shouldn’t.

Like why do you think people are against eugenics? Because they’re afraid we might accidentally bring an end to genetic diseases? That there might be too many blonde people? That they care deeply about people who don’t exist yet’s rights to be some particular way?

So yeah, when you propose a rule controlling reproduction…