I think it bears parallels to eugenics, from a risk perspective. We don't understand the genome well enough to ensure that effects are isolated. Flipping gene

I think it bears parallels to eugenics, from a risk perspective. We don't understand the genome well enough to ensure that effects are isolated. Flipping gene A to make someone taller might also turn them purple unless you also flip genes B, C and D which we didn't realize were related. As it spreads, there are also dramatic risks from population-level genome homogeneity. Imagine if flipping a particular smart gene on also caused genetic predisposition to severe infections from certain viruses/bacteria, and then Sars-Cov-3 happens. Right now, I don't think we can guarantee that won't happen.