I don't see what's so bad with it... We are against it nowadays because morally and ethically its wrong, but once people get past the stigma, it only has benefits.
Genetic diseases, help the humane race in simple aspects (anti-poison and anti-infection like Komodo Dragons) that don't "change" the spieces in anyway.
Anyways, if one day we WANT to survive and get off this planet, we'll have to go through genetic engineering anyways, given that our bodies aren't made for space travel unlike what Star Trek and such want us to believe
