The whole disease/not disease thing is endlessly debatable. What matters is what his intention is and what you feel.
If it sounds like/feels like a cop out to you then I believe you and I believe you know best how to assess this person's intentions.
I believe addiciton is s disease that kicks in after years of bad choices - kind of like type 2 diabetes. Once it's there - embedded in your physiology/metabolism - well, it exists as a progressive disease process in the body. And only the alcoholic or diabetic can control what they choose to put in their body.
But alcoholism is no excuse for bad behavior. I have an A bro who is sweet as pie, very gentle and has never spoken a harsh word to anyone. And another who was a belligerant a**hole when he was half in the wrapper so one can't blame alcohol.
Being drunk explains a lot but it excuses nothing.
I think wherever you go, drunk or sober, there YOU are, just being yourself!!
peace-
b