[teh_infallible]

Exactly! I don’t see how anyone can justify permanently altering a human life like this, in the absence of a clear pathology.

Wouldn’t it be better to simply not have a child?

[AstralStorm]

Easily. If it is an improvement with low chances of failure and even lower of catastrophic failure, why leave all the failures to nature?

Not having, say, HIV resistance could be considered a failure of nature, a deficit.

We're not talking about frivolous modifications for no reason here.