Doing ten shots of tequila is a 100% scientifically proven cure for social anxiety then. If you take it and your anxiety lessens, that's the greatest proof you can ask for! Let's just completely ignore the crippling morning hangover and liver damage
I mean... Yeah. Alcohol is very well documented and even more widely used for exactly this purpose BECAUSE it works.
The side-effects are often terrible. This is also true for many widely-prescribed drugs, and has been even more true in the past. The folks I've known on MAOIs were pretty wrecked.
But I don't think we've seen cannabis, especially when not smoked, have anywhere near the health risk of alcohol.