[pseudalopex]

Most of your argumentation fits arthritis equally. Are you so philosophical about arthritis?

I would describe your main point as advocating the social model of disability and completely rejecting the medical model. The social model is a powerful idea. Certainly applying it more would benefit disabled individuals. It is incomplete alone however. And many researchers and practitioners understand the social model better than you seem to think. Ask people who tried for work accommodations if they had problems with their doctor or manager. Ask people with ADHD how it's affected their relationships.