@trophI can only relay my experience with someone close to me who was in a similar condition as your friend a few years ago. This guy was a 1st ballot HOF alcoholic and in his mid 40s wound up in the ICU sedated in a coma for a week. Liver failure which led to renal failure, jaundiced, and retaining fluid in his abdomen.
He came out of the sedation after a week and it took some time for the encephalopathy to clear with round the clock dialysis. After which his liver doctor told him his drinking days were over, that he would die without a new liver, and he would be on dialysis until he got a new organ. His MELD score was in the high 30s.
He wasn't an AA guy either. Despite the best efforts of people in the program coming to talk with him, he was too hardheaded to admit defeat. Impressively unreasonable even for an alcoholic. He remained dry for the next 12 months because he was physically incapable of basic tasks including transportation. Sobriety was a choice made for him but he still thought he was in control.
We buried him about a year later. His body just couldn't recover from the damage he had inflicted and started shutting down just when we were getting hopeful. He left behind a wife, a beautiful child, and lots of people who cared about him.
We alcoholics are prone to insane thinking and can be quite pugnacious when someone starts lecturing us about our booze. If he and his husband don't listen to his doctor when they read them the riot act, then dead man walking is a certainty. This is not a speedbump to endure before they can make a few changes to their lifestyle. I don't have any experience with an interventionist but I think that has a better chance of success than a social worker assigned to your friend. He needs a hard, pipe-hittin alcoholic to get through to him.
I'd also encourage the husband to attend some Al Anon meetings though he could be a candidate for AA himself.