There's a reason it's called "liquid courage."

Alcohol is a disinhibitor. While there are different reasons that people use it, many find that it enables them to step away from their anxieties, if only temporarily, and feel a sense of connection to the people around them.

I'm not saying it's a reasonable substitute for healthy communication and relationship skills, but for some the development of the same can be a long, slow, and difficult process.

The use of alcohol as a "social lubricant" can help some people get through the hard times. Life is difficult for everyone, and I don't think it's fair to accuse anyone who uses alcohol as a way to lighten up of "not having a personality" unless and until you've walked a mile in their shoes.