I'm not at all surprised at this news.
I have worked on alcohol treatment units and was married to an alcoholic for 17 years. Professional help was sought so many times and given - it was however rejected by the addict because alcohol was all he wanted.
No amount of professional help can stop a person drinking - they have to want to do it. Some of them do not want to do it enough.
You are right. He says he's an alcoholic, but has he actually admitted it to himself. It doesn't sound as if he has. Only he can stop drinking. It would be great if he had family/friends/doctors backing him up (and not the type who would take him to a pub), but at the end of the day it's down to him.