I used to think the same, and then I started to drink socially and saw
1. all the things I had been just quietly not been invited to previously
2. the social lubricant aspect of alcohol that I didn't appreciate till I experienced it. This is not just the physiological aspect , this is the social effect as well which can't be replicated sober (see freshmen college students getting "drunk" on alcohol-free beer).
Its difficult to articulate, but the excuse of inebriation creates a "safe space" to let loose in a sense. For instance, if you make an offcolor joke sober people may find it very funny , but they'll also think you maybe lack manners or don't know what's appropriate "She's funny, but kinda low EQ". If you are inebriated (or even pretending to be) then you are safe from judgment up to a point. This opens a lot of doors, and opportunities to bond with people.
Bc of the judgment aspect, no one likes to drink with someone sober - so you're just not seeing it for the most part
I had another analogous experience. All through high school and college I didn't use Facebook. In the last year of college I relented - suddenly I was being invited to stuff left and right.
You don't know what you don't know. Dogmatic beliefs not grounded in experience aren't worth much
Try drinking (responsibily) for a couple of years and then come back making your proclamations. There are very few people that have actively tried both lifestyles and chosen to be a teetotaler. When that does happen , it's generally because of issues of self control, a predisposition to alcoholism or bc they tried it a few times and never got used to it