You're getting downvoted because noble people aren't seeing how closely related "fixing defects" and "eliminating undesirables" due to a loose definition of "defect". Human traits are on sliding scales. Is drawfism a defect? If yes, then how short is too short? There is overlap between the tallest dwarfs and the shortest non-dwarfs. We talk about autism being a spectrum - so where on the scale does that qualify for genetic modification? Who gets to decide these limits? To say it'd be up to the individual could then open it the other way and allow for unethical modification beyond natural traits.

I'm not trying to see cancer deletion tech leads straight to nazis, just that these are real ethical debates that are already raking place. We have the architecture of embryo design in place