[gadders]

It's an interesting thought experiment. However, a lot of scientific discoveries have the possibility of being used for good or ill. Why single out this one?

Scanning of foetuses allows you to spot any issues to help keep the developing baby healthy, but is also used to abort female foetuses in some places.

Or what about nuclear physics - you get a decent energy source (subject to green objections) but also nuclear bombs.

I think until a scientific discovery is widely known, you never know what uses for good or ill it would be put to. Supposing the technology you outline above plus gene editing cured heart disease or cancer?