The government should not set the driving age and should not own the roads You probably live in the middle of suburbia. A place made up of two groups of people - those with a driver's license and those without one. And though it is blatantly obvious that everyone should be allowed to have a driver's license in suburbia, the government is aggressively trying to make the driving age equal to the drinking age. Since the government owns the roads, the politicians can decide who is allowed to use them.
Politicians also control the sidewalks, which is why they can outlaw loitering.
When you turn 18, vote for Libertarian politicians who will sell off all the roads and sidewalks to private businesses. If a 7 year old can pass the driving test, then she gets to drive. No, because everyone still has to pass a test. But this test would not be given by the government.