One could probably make the argument that if every deaf person was cured, the uniqueness of deaf culture would be lost.

I was listening to the Hitchhiker’s Guide to the Galaxy radio series last night, (I just found a long misplaced CD with MP3’s of it recently) and there was a whole bit about people using simulated maladies in order to motivate them to achieve great things. (Real diseases long having been conquered, leaving the medical community seeking new forms of income.) One character even has a gizmo that instills a fake fear of pursuit to run faster. Douglas Adams was truly ahead of the curve.