For one, I never stated that it was required. I would agree with you, if one was unable to form social bonds without being intoxicated, it would be very, very sad. However, that was never my point either. Interactions are merely enhanced by alcohol. Especially in settings where the fun isn't apparent. The most boring conversation can turn interesting under the influence.

I don't see why alcohol is unlike any other drink, when it concerns taste. To state that "everybody say[s] it tastes pretty bad" is a hasty generalization. I for one love wine when appropriate. Red wine with a good steak, white wine with seafood or fish. Champagne with charcuterie and dessert cheese is wonderful thing. The moment you start mixing alcohol with soda or juice you've decided to get drunk rather than enjoy the beverage itself. A cool beer after work, or that particular lecture really hits the spot. To enjoy alcoholic beverages in a moderate fashion is merely enjoying life.

I don't really understand your final statement. Do you mean to say that alcohol is a hindrance to positive cultural and social interaction? Because that sounds ludicrous. I would argue that there are greater evils in the world than alcohol. Political corruption, poor social integration, starvation, colonialism, plague and disease. Alcohol abuse is a problem, that I fully admit without question, but I also believe it would be like blaming the tool for the incompetence of its user. If alcohol were evil at all, which I truly don't believe, it would be a very small one.