Little problem...for good reasons, editing the germ line of a human is illegal in most countries. But now that Nazism is cool again, why not go full Mengele. Secondly, this is somehow better than pre-implantation genetic diagnosis? That's >30 years old, it allows to only implant embryos free of genetic disease. Stops the disease in future generations forever, without the error rates of gene editing.

What do they consider a genetic disease? Brown eyes and hair?