That comparison is confounded by the fact that most people, at least in the United States, get their driver's permit and license at a fairly young age, and don'

That comparison is confounded by the fact that most people, at least in the United States, get their driver's permit and license at a fairly young age, and don't have driving experience before that. A fair comparison would be between licensed and unlicensed drivers with the same amount of experience, but that's pretty hard to come by.