Read other letters about this article
was (among other points), that a lot of alcoholics would laugh their a$$ off at him. In the vein of "You call yourself a real drunk and you don't even know how to handle a drunk-driving arrest? Let a veteran tell ya how it's done, boy-o." In other words, they'd laugh at his public persona of Mr. Macho, juxtaposed with his "I'm not going in your car!" comically wacky behavior.
I've attended some open AA meetings--one thing that struck me (as a non-alcoholic)was the laughter involved in such meetings, along with the tears, anger, fear, etc. It's part of the healing (and humbling) process.
While I don't think it's Cary's best work--some of his responses to LWs have been amazing--I can appreciate it in that context.