There is not a single reason for any human to get access to alcohol to drink.
Edit 1:
Just to add the people who say that banning does not work is like saying banning guns does not work because people is going to find a way to get them or like saying we should not have speed limits because it does not prevent people from speeding. (Their opinions does not make sense to me)
It is not up to you to decide what I have access to. There is such thing as responsible drinking. It is not like nuclear bomb when the only possible use is damage of other people lives.