Let me ask you one direct question: if a couple’s child will definitely be born with a disease that means a short, painful life, do you really think we have no right to change that? Embryo editing isn't about designing perfect babies. It's about stopping real suffering before it starts. We already accept IVF, prenatal testing, and terminating pregnancies for these same conditions. Editing a single faulty gene is far less destructive than that. So tell me plainly: is a life of agony something you'd force on a child, just to keep your principle clean?