The drinking is not his only problem. His drinking is in response to other problems he is having. Well-adjusted people who have a good approach to life don't just start slamming shots in the middle of a meal. His general approach to live was not working for him, even before his alcohol intake became excessive. I've had some problem drinkers in my life. Some of them did stop drinking. They still had serious problems.

Every drinker knows about AA . . . knows there is help and sources of support to get sober. You're not awakening him to anything he hasn't heard of before. If you want to do some good in the world, find a worthy charity and volunteer some time.