It is not as simple as you're suggesting here. Deaf people have their own culture and language, and while it is built on a lack of something considered normal by others, that doesn't mean it's inherently just a disability that would / should be eliminated unquestionably.
Consider a similar example: if immigrant parents could instantly make their children forget their native languages and learn English fluently, many would choose to do so – as it would give the children more economic/social advantages. And yet I don't think we really want to say that not doing that, and instead retaining the native language and culture, would be a coping mechanism.
Culture and disability is a really complicated thing and deaf culture specifically should not be brushed away as just a coping mechanism.
(Side note: I am deaf in one ear and agree with the commenter above that it's actually a benefit for going to sleep, but of course this isn't considered a benefit by society at large.)
Consider a similar example: if immigrant parents could instantly make their children forget their native languages and learn English fluently, many would choose to do so – as it would give the children more economic/social advantages. And yet I don't think we really want to say that not doing that, and instead retaining the native language and culture, would be a coping mechanism.
Culture and disability is a really complicated thing and deaf culture specifically should not be brushed away as just a coping mechanism.
(Side note: I am deaf in one ear and agree with the commenter above that it's actually a benefit for going to sleep, but of course this isn't considered a benefit by society at large.)