we're talking about editing existing genes, as in forcing the selection of an advantageous gene they had a % chance of inheriting anyway or likewise ensuring that a gene that might cause them illness and that they had a % chance of inheriting isn't inherited - you're talking as though they're replicants or something
likewise you could just have IVF, create multiple fertilised eggs and then screen them - would you apply the same rules there, if someone was born via IVF, no gene editing but the parents decided to chose them based on certain genes they happened to have and dispose of the other fertilised eggs, end result can achieve the same thing as forcing the selection of some genes that might otherwise increase the chance of illness and are known to run in that family, or when it is know that this embryo has a better chance of being taller etc..
I'm not though.
Reduce the amount of myostatin a person produces and they'll look like Arnie without ever touching a weight.
We've already identified some genes that control this
As experimentation becomes more and more normal and researched we'll be discovering the genes that control all sorts of things.
Like you said certain African people are way better at sprinting what happens if you modify your white English baby to have the genes that cause that advantage.
Also it's not just genes that exist we can add new ones.
How about the ethics of making a glow in the dark human? (Pretty common genetic experiment)
