2. What you mean to say is denying people the ability to regain their sense of hearing, and the medical interventions you're alluding to don't do that to the extent you're imagining. Our best approaches, cochlear implants: don't restore hearing in the way that removing earplugs would, have a large learning curve; only work on some people; and the affected person's brain usually can't be fully capable of understanding and reproducing spoken language the way a born-hearing person would. People who receive them also still rely on some amount of lip-reading, sign, and apps.
3. People who are adept with sign and familiar with the deaf community often communicate far, far easier with sign language than a hearing person communicating with a deaf/HoH person who has a cochlear implant
To what extent do you actually have knowledge and experience on the topics you're discussing?