My brother (with bipolar disorder) has recently committed to alcohol rehab in principal, although it takes significantly more time for it to actually happen than you might think at least in the US. There’s back and forth about medicals and insurance and interviews to try to see if patients are truly committed and even seems to be review boards with cross functional teams including patients that approve intakes. Not sure about court-appointed situations, but I remember some time ago when he was in alcohol related legal trouble, the mental health resources said he wasn’t really ready for it yet.
I believe chances of success and reviticism are very poor for people who go to rehab for people without being committed to the process, so in order to save time money and precious bed resources they are very careful to ensure the rehab will “take”. I had a work buddy confide in me that he went to a rehab for drugs and alcohol that was seemingly easy to get into, but the vast majority of fellow patients were court-appointed and he was a novelty for having checked himself in. The rehab didn’t “take” for long and his opinion was it was set up as a revolving door money-making scam for insurance money. As with inpatient psychiatric care, my understanding is the quality of care varies widely from state to state, county to county or city to city.
As far as getting him to accept that he needed treatment, my siblings and I had been angling in on it for months as he deteriorated, and he began to have money and other troubles because it was an expensive habit and there were consequences to actions taken when drunk that he couldn’t ignore. So it was combination of removing enabling factors, incentives toward treatment, tag team negotiations of all the siblings working different angles, but we couldn’t seem to get him to commit. Then miraculously an old friend of his who has similar issues visited him and was able to take him over the threshold of calling the rehab facilities himself— which was part of all of their processes— and offer to buddy with him during his recovery and so on. My brother was better able to “hear” what he was saying than from family members most of whom have not had significant alcohol issues, yet far more skeptical and jaded about the possibility of this working. I suppose you could call him his “sponsor” although I don’t believer this is an AA/NA recovery framework. We are still skeptical, but have far more hope than before. I think the secret ingredient was someone he would listen to showing that he cared, and remaining positive that the process might work. I know these sorts of friends aren’t ready-made or always hiding in the woodwork, but most users and abusers don’t use alone, so you may be able to find a friend like that in his past or present if you scratch hard enough.