Hundreds of millions of people drink alcohol every month and lead perfectly healthy lives unaffected by addiction.
Between drunk drivers, abused spouses and abused children there is a ton of alcohol related misery. For me personally none of the positive effects of alcohol begin to offset those. Not everybody is able to deal with addictive substances in a responsible way.
I'm perfectly ok with other people drinking (as long as they don't negatively impact others), I just saw the generalization above and figured I would contribute a slightly different point of view.