From an evolutionary perspective it‘s interesting how the further medicine gets, the more we inherit genes unfit for life without medical support.
Anyway, this baby proves we can fix hereditary diseases now.
That comes in many forms:
Black/dark one, nazi style, where you outright sterilise or even kill those with unhealthy/bad genes.
And white/peaceful one, where you‘d appeal to those with unhealthy/bad genes not to procreate and encourage those with healthy/good ones to do.
You can‘t seriously tell me it‘s not extremely unethical for people with huntington‘s disease or cystic fibrosis to have children.
Second, according to a quick search, 10% of cases of Huntington's Disease are due to new mutations; I suspect (but I'm a HN commenter, no geneticist) this is the case for many other genetic conditions.
So the other ethics question to ask: should people be able to get DNA tests for genetic conditions (voluntary)? I'd say yes. Should people be mandated to get DNA tests and be forbidden to procreate if there's something in there? No, that's eugenics. Should people who know they have a genetic condition and there's a chance their child has it too have children? That'd be their choice. I don't think it's fair for people to intentionally place a burden on health care systems like that, but thing is, there's very, very few people that have children with that as the intent.