I don't know really know either. I mean I never much cared about the drinking age. I wouldn't mind it if it were 18 tbh. I'm not sure that the drinking age is the main reason for these diverging experiences but rather cultural differences. Not that everyone is perfect here, I still remember how a collegue tried to persuade another friend to drink a beer when we were 15 even though my friend didn't want to. And I surely remember all these embarrassing stories in highschool from people who bragged about how much they drank. But everyone can choose their own friends and tbh when you get a bit older and have more experiences with alcohol it loses a lot of its initial allure.