The idea that any amount of alcohol is bad for you is about as surprising of a concept to me as vaping actually being bad for you. Drinking poison or filling your lungs with anything that isn't air is not healthy.
Of course I'm not implying that alcohol is in any way healthy, but it's probably healthier to have great drunk moments with your friends once in a while than it is to be lonely and not drink. It's important to note that you certainly can be social without alcohol though.