Hank Greely was quoted by the Genetic Literacy Project in “‘Scorching ethical debate’: Designer babies are already here. The future looks even more revolutionary — and contentious”.

Apart from that, gene editing is a complicated, costly, and pretty dubious way to get what others have long gotten by other means, especially by selecting an embryo containing the gene of interest. Most things you can achieve using gene editing can also be achieved by embryo selection, argues Henry Greely, a bioethicist of Stanford University