The important thing to remember is that the negative effects of beer (alcohol) are always in studies of heavy drinkers and positive effects are in studies of moderation. Perhaps the guy was chugging too much. Two Beers a day keep the Dr's away!!
Rebelo, Good responce but I just have to point out your own prejudice and over simplification.... Recent practice has found those leaches are great. When applied after surgery they can greatly reduce swelling and bruising. Also modern use of maggots has been found to save limbs/lives by removing of dead tissue and avoiding gang-green.
Americans tend also to have a all or nothing attitude. Things are either good or bad, all the grayness is scary. So people love to generalize but life is complex!