I'm not sure you know what a dichotomy is, but alcoholics span the range from functioning to absolutely crippled, and everywhere in between. Alcoholism is a dependence on and addiction to alcohol. No more, no less.

Jim Koch is able to function fairly well as an alcoholic that many people wouldn't be able to because of the industry he's in.

And as to your other comment, unfortunately, I'm all too familiar with alcoholism and its many forms. There's no such thing as "true alcoholism," there's just addiction.