I think you may be applying an extreme case to the general population. Very few people are waking up with a hangover from 1-3 beers with dinner, and for those p

I think you may be applying an extreme case to the general population. Very few people are waking up with a hangover from 1-3 beers with dinner, and for those people it seems like it would be a very quickly self-resolving problem. On the other hand, if someone's waking up on a Monday with a hangover because they had 300 ml of whiskey on a Sunday night, they're not representative of the general population, they're an alcoholic.