Harambulus,
I think the "Addictive Voice" / The Beast concept simply narrows down a concept that can be dangerously abstract otherwise.
It simply anthropomorphizes all the urges and pulls to drink and the rationalizing that goes with it into something more tangible.
To me, the Beast has many faces. The face of alcohol consumption is just one of them. You might want to envision it as a sort of Medusa, although I don't prefer to view it so negatively. I think the Beast is just dumb and benign unless part of it are allowed to take control over urges that are best left to rational consideration.
So, no, this concept need not "set you up for misery and depression".
The idea is not to consider the Addictive Voice / Beast so much as a negative entity but just a natural part of you that you need not allow to annoy you unnecessarily. YOU are the one driving the vehicle.
FT