I have not responded to the question, "is alcoholism a disability". Probably because it depends. Alcoholism is a disability IF it's affects impact an individual from working. Now, I do NOT mean one's drinking, but I mean their alcoholism... and, btw, I do agree with the disease model of addiction. When it comes to addiction, I see using it as a disability as a very narrow scope. For example, an individual works at a liquor company, bottling liquor. If he drinks on the job and creates problems because of his drinking, while NOT receiving treatment, he should be fired. If he gets treatment and cannot continue to work at that liquor company because of the threat of relapse (threat towards his health), he is disabled from that position and would be found to receive disability benefits until he can secure another job where relapse is not as much of an issue. I have seen people receive disability benefits for addiction practically NEVER. The addiction itself is a pretty serious disorder that requires treatment and does not earn scorn. It is the behavior that is the issue. Every addict has a choice: receive treatment for their addiction or not. Those that do have my sympathy/empathy. Those that do not, do not.
Oh, and to address something that was just discussed, an anxiety disorder... a severe one is certainly a disability. My brother has been receiving SSD benefits for his anxiety related disability for several years. He cannot function as other people can.