Is that what you want, that most of this didn't exist? I'm not arguing one way or the other, I just haven't seen you explain what your objective is, why you are pointing out that there are many industries tied to the deaf.
You propose to keep only education-related services/products (asl and oral deaf schools/colleges and associated educational professionals/academic research) and eliminate all else? No hearing aids, no accommodations, no medical services/professionals, no deaf arts (except for theatre), no lobbyists/legal, VR, deaf commissions, NAD, captioning, and so on down the list? I need to put some thought into what that would be like before I respond further, but is that what you are looking for?