. . . No, the Deaf are not in treatment, they are not considered psychotic, and yes, they, by and large, would prefer to give birth to deaf children rather than hearing.
If hearing impairments were treatable or able to be eradicated, an unique culture would disappear, and the Deaf are militantly opposed to that happening.
But you really must understand, Deaf Culture is unique and viable, and the Deaf will defend it until their last breath.
None of that changes the objective fact that deafness is a disability. It‘s a handicap, an impairment, a deficiency, a pathology. As Abraham Lincoln said, a dog doesn’t have five legs just because you call a tail a leg.
And anyone who would wish their child to be born deaf has serious mental issues.