Completely agree with this - he has had this before of course, countless times...............
I don't care if he needs a thousand detoxes and rehabs IF the final one works, but clearly he is once again going into this at the behest of others. He will fail unless HE wants to stop.
As others have said, his major problem - and the biggest hurdle for him - seems to be that he doesn't have anything else in his life other than his booze. No focus, no active career/interests, no tight family network to support him, nothing to make him feel that that there's a life out there for him after booze.