That's not even close to the argument being presented.
The fundamental crisis within the deaf community is around the fact that deaf people share a common language. This is very different than most other disabled communities. Language is fundamental to shared culture.
To be clear, I'm not saying that deaf children should not be given cochlear implants, but the issue is much more complex than "being deaf is the same as being able to hear." It's that deaf people historically felt a sense of shared community and culture. The ability to "fix" (a term many of them would not agree with) deaf people leads to a challenging position where a culture is slowly being destroyed.
It's much closer to the choice white American parents who adopt Asian children have around what culture should those children be exposed to and how much. Is it okay to raise an adopted Chinese child exactly the same a white American child? Should the adopting family try to learn Mandarin? Teach the child them about Lunar New Year? Make friends with other Chinese families in the community? There's no absolutely correct answer for any of these questions, but they are issues families in these situations must navigate.
I suspect your immediate response is that being Asian isn't a disability, but I would point out the first point in my comment: deafness, unlike other disabilities, does have it's own distinct culture because of shared language (not shared disability).