That is why I see flaws in natural selection as presented.. there is no logic, no intent, no choice, no awareness, no ethics. Humans are said to evolve from such, which I see as a large problem. Humans are many things contrary, as seen by our ability to artificially select and oppose the racist forms of natural selection and racist forms of eugenics, also seen by our logic, intelligence, having intent, awareness, choice, ethics. Also as you've mentioned, choosing our mates and/or having them chosen for us. Natural selection allows for no choice/no intent yet would state that humans evolved from such.
I understand that you're not advocating for such. However, many humans have done so in the past and still do today (Social Darwinism.) The problem with Eugenics are that the social class with the most power and control will deem whatever they want as disease and psychopath.... so for instance, anyone believing or thinking an alternate way from them (Ie: believing in God) can be used as an example to label one genetically flawed. The reality is that the social class in power and control will advocate for whatever they think is best.