If a progressive movement started advocating eugenics, they would be advocating a return to previous social mores - that's conservatism in a nutshell. Just because that movement also happens to hold "woke" ideas doesn't change the direction they want to carry progress.
This isn't a moral gotcha for anyone who has more historical memory than a goldfish - the problem is that most people don't seem to care to, so they come up with contrived examples like yours bc they can't keep the thread of human history for longer than a generation.