I think he wants to create a whole bunch of babies in a laboratory environment, sort through them while they are at the zygote stage, and kill the ones who are “genetically defective”.
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The sci-fi movie “Gattaca” is a great exploration of a near-future world where they do exactly that. It shows a world of genetically selected individuals and the outcast in-valids, who are born naturally without genetic selection.
Normal people view/read dystopian Sci-Fi as a warning. For Leftists, it’s an instruction set.