Yes having flirted with being an alcoholic myself (I got out in time. I have to be careful these days as I don't seem to have the bit of my brain that says 'stop') this is one thing a surprising amount of people do not seem to understand. It makes trying to help someone very difficult and it only takes one stupid move to set things off, sometimes seriously.
To an alcoholic, drinking is fun, its what they want to do, it is part of them, they don't have the inner voice that says 'stop', but that doesn't matter to them because stopping is for boring people who don't 'understand' and old woman down the Church anyway. Alcohol is their friend, their crutch their emotional protection against the world, including you if you try to tell them otherwise, so if you try and go in there like a bull in a china shop, they will want to run a mile and you will be the dullest person on Earth to them, trust me (despite realising that you mean well).
Besides, having a problem will be for 'Tramps' as mentioned in the OP, not them!
So be careful, there is no use going in all guns blazing, fire and brimstone and denying an alcoholic access to alcohol, it just doesn't work (counterintuitively as it sounds), they can't simply stop over night unless they themselves have decided too.
Luckily (although I might be wrong) it sounds like he at least realises things aren't right, which is a start at least.