Of course it's a disability. It's a self inflicted one though. If a drywaller decides to cut one of his arms off his employer is under no obligation to find him another postion to do a half assed job.
If I was the employer, I'd llkely give the guy a chance to rehab BUT I would never allow him to drive again. I don't undertand though.....if the employer offers him a warehouse job and it pays less is the government saying they can't do that?