The classical solution of preventing individuals reproducing doesn't have to the the only solution. Prevent by natural reproductive methods perhaps, but at some

The classical solution of preventing individuals reproducing doesn't have to the the only solution. Prevent by natural reproductive methods perhaps, but at some point, we're going to be able to genetically screen individual sperm and eggs. Though the latter will be a lot more difficult with the limited supply. The visceral opposition will be there, but the philosophical issue is partially sidestepped. There is clearly a hierarchy of problem genes which will mean that the philosophical issue is not eliminated. Debilitating diseases is obviously something people are not opposed to eliminating. Eliminating the more subtle personality "defects" though will prove a lot more problematic where we start going into issues of homogenisation in a population.