It's not gonna to be easy to tell what research for gene editing to cure diseases and gene editing for better traits. Again, He Jiankui managed to do so in secret, and who knows how much he could have gotten away with if he hadn't held a press conference.
That's why it's called a research project. Also, by this logic, nobody should ever have children. There's this thing called random mutation, that happens everytime someone gets pregnant, you are always flipping a coin when having a kid. Oh and there's also the chance that the genes from different parents don't match up well. That's how genetic diseases and deformities develop, even in families that never had history of genetic issues.
