My opinon is that.

Here are things we are allowed to do at 16/18

Drive a car.
Vote
Buy Marriguana(Where Legal )
Buy Lottery Tickets.
Join the Military
Get A Job
Buy Cigaretts.(Not actually doing this myself)

So like we are allowed to join the millitary and even die for the country but not allowed to drink Alcholol?
Now my father is from Italy and in Europe threy have no Drinking limit and Imo it allows parents to educate children when they are young and kids my age wont be currious and do something stupid. Its called the Forbidden fruit syndrome