Hmmm, in America the most common intervention is AA, whose doctrine is that willpower alone is not sufficient, that you must appeal to a higher power. We also know this intervention isn't any more effective than someone just trying get over it on their own, yet it persists, and is even court ordered often. There will be replies to this post about how AA "worked for them" or something to that effect. Which doesn't mean anything.
My brother struggles with alcoholism and has been on and off the horse, with AA as the main thing all the time. The primary impact it seems to have on him is that all he wants to talk about is AA and alcoholism. It becomes his identity. "Alcoholics do this, alcoholics do that, alcoholics are like this". If I thought that was helpful then fine, but it seems more rewarding identities would be possible and less limiting.