There is a book called "The Truth about Addiction and Recovery" that you might find interesting. One of the points it makes is that focusing overly much on the drinking problem tends to make it harder to solve. That resonates with me. My father drank a great deal in his youth, probably to try to drown out memories of his time on the front lines in two wars. He developed a heart problem when I was a little girl, blamed it on the drinking and never drank again. I think part of why that worked is because he was never labeled "an alcoholic" and my mother never made a big issue out of his drinking, in part because he wasn't a mean drunk and there was always enough money.

I think people do things for a reason. I would wonder what the reason was and try to address that in a non-blaming, non-controlling fashion. I think trying to "fix" another human being generally comes across as blaming and controlling and, because of that, tends to be rejected by the intended recipient. You might also consider reading some material by Deepak Chopra concerning the impact of the mind/attitudes/mental framing on health outcomes.

Good luck with this.