Thank you for your thoughtful reply but I think you're misunderstanding my point. I'm not conflating coercive eugenics with modern reproductive healthcare, nor am I making a moral equivalence between them. I'm just noting that they historically interconnected, especially in the early 20th century, and that this interconnection is becoming more and more relevant today.
Margaret Sanger’s involvement with the eugenics movement isn’t just a footnote, it is a well documented cornerstone of modern reproductive medicine and social policy that people fight over (defund planned parenthood). She did support birth control in part as a tool for what she (and many others of a variety of social/political stripes) saw as social improvement via population control. People who support planned parenthood today have a hard time admitting that the services it provides aren't just about improving the well being of the people who seek them out, but society as a whole.
Your comment assumes a hard boundary between individual choice and eugenics but historically, eugenics wasn't always state-imposed or coercive — there was also a significant "voluntary" eugenics movement, which promoted individual choices aligned with what was considered beneficial to the population. That included birth control, selective breeding, and now, genetic counselling. This is often referred to as liberal eugenics in bioethics, which even today is a subject of serious debate — not just "word games."
“Positive eugenics” is encouraging the reproduction of the “fit.” That’s exactly what I said — that it’s about encouraging the “best” possible reproduction. “Fit” is a subjective term, a racist Japanese eugenicist would tell you that it means something different than what a racist South African eugenicist would tell you, and a person versed in biological science pre-Watson and Crick would tell you that it means something different than a genetic councillor of of today.
I agree with your concerns about human dignity, discrimination, and coercion in genetic intervention. But I feel that the way to do that is to put as many of these tools as possible into the hands of the people who want to reproduce, and have trained experts with proper oversight guide them to make the choices that they want to make.
I'm not defending hideous eugenics practices. I'm just saying that we can't pretend like it’s an alien concept that has nothing to do with the modern reproductive medicine.