Other disabilities should be cured as well.
But remember, even if there's a cure for deafness NOW, you WILL never live to see the deaf culture totally wiped out because it takes many years to acquire ASL and Deaf culture and if you're cured of deafness, you'd NOT going to be just hearing and forget ASL/Deaf Culture/Deaf friends.... they'll be with you forever.
But it's different when you want the next generation to be better than your generation.
