As a conservative, my position on genetic intervention is about ethics, human digniity, and the sanctity of life and not some kind of blanket opposition to treating genetic disorders.

I have no moral problem with a therapeutic intervention that improves a life by treating a debilitating disorder with no cost of life.

I will have moral problems when those ideals are inevitably twisted and loosened over time to not just treat disorders, but pick attributes like intelligence, strength, skin color, attractiveness, etc.