Not trying to bust on you, but the fall back argument against alcohol is the "altered state" stance. Which, as you have helped to show, there is a lot of things that create altered states and not many argue against those. I agree with drunkenness being a problem, but we cannot simply say an altered state is a problem.
I think we agree then lol. I dont think "altered state" is a good enough definition to say something is sinful or not. I dont think caffeine is a problem.. I do think anything in excess can be sinful, or gluttonus (spelling is hard). Also certain drugs like alcohol, we can take their properties that they cause and use those to tackle subjects like cocaine, meth, marijuana/pot, etc. Its good interesting conversation at the very least.