Simple tradition, I expect. In many situations and cultures, consuming alcohol is simply the done thing, and not doing the done thing a surefire way of standing out. I’d also guess that people who drink in these situations expect everyone to know the social norms and agree with them (even if it’s only an unconscious background assumption), and so they’ll see not wanting to drink as wanting to stand out. And you know what that means.
Simple tradition, I expect. In many situations and cultures, consuming alcohol is simply the done thing, and not doing the done thing a surefire way of standing out. I’d also guess that people who drink in these situations expect everyone to know the social norms and agree with them (even if it’s only an unconscious background assumption), and so they’ll see not wanting to drink as wanting to stand out. And you know what that means.