Honestly, most of the discussion comes from your lack of imagination.
You don't understand that one doesn't have to think like a little dr mengele to have personal choices result in a genetuc and therefor eugenic effect on what children one will have.
For example, if a woman makes a conscious decision to have children before she is 30 rather than after, that will have a eugenic effect. If she prioritizes someone tall to have them with, that has a eugenic effect.
I've given you a long list of historical eugenics and you still seem to operate in the illusion that it only is eugenics if one puts on their proverbial "I am a god" scientist hat and plots to murder the impure.
Just choosing someone for looks has a eugenic effect. While standards may vary, everyone chooses for looks to some degree so we all participate in it.
Is it the cognitive dissonance that is produced by you finding it completely immoral and having poor practice at being a moralfag that is producing this unproductive discussion? Where you'll ignore the long list of examples and even backtrack on whether what the spartans did really was eugenics?
I genuinely find it hard to understand. I guess another explanation could be cognitive dissonance on my part, as I operate on the assumption that anyone that engages in longform discussion is approaching it with some degree of intellectual honesty and curiosity, but there's no need for that to be the case.