Many people here self-diagnose as Asperger's. Can you not see why they would not want a "cure"?
Being an extrovert objectively gives you great advantages in (most) societies. As an introverted parent, I would definitely fight any "cure" for my introverted children.
Furthermore, if both parents are deaf and the kid is not deaf, there's a good chance that in the first so many years of life, the kid will have poorer mental development than the deaf kid. Not quite the same, but an example: Deaf kids born to deaf parents hit the same language milestones as hearing kids born to hearing parents. But deaf kids born to hearing parents do worse, because the parents don't know the appropriate way of thinking/communicating.
Related: Deaf kids who were given cochlear implants, but no sign language training fared a lot worse than both hearing kids and deaf kids who learned sign language.