Alcohol doesn't help social anxiety except by social convention.

Society believes alcohol changes personality, and that drunk people are less themselves. Thus, they judge drunk people less harshly (including themselves).

But alcohol doesn't actually change personality. It only makes your brain work slower. It doesn't make it go anywhere it otherwise wouldn't, you just get there later.

What we've developed is a way to split up when we're accountable. I promise you that split is zero-sum: the more leniently they judge your social behaviour when drunk, the more harshly they judge it when you're sober.