If I understand correctly, what you're saying is that the tradeoff is whether or not for the child to have the disability but along with it the opportunity to g

If I understand correctly, what you're saying is that the tradeoff is whether or not for the child to have the disability but along with it the opportunity to gain a close-knit and supportive community with a shared language. (Although, given the child will continue to need a cochlear implant or similar device, they'll still be disabled either way, and nothing is stopping them from learning sign language too.)