Agreed. And ideally that shouldn't matter. But in the real world there are other consequences and side effects. Maybe I don't want to make them uncomfortable. Maybe I just don't want to deal with the nagging, "busting my chops", or the questions about why I'm not drinking. Maybe I want to avoid some preconceived notions certain people may have about people who don't drink. So even if it's on them, there are still personal reasons I may want to avoid the situation.