you're absolutely right, it is limited to safety factors, as i said, scotus stated in rather strong dicta (which has never been overturned or challenged), that a state has an interest in keeping its citizens safe, thus, it can require a license:
hence, if you are going to drive on
state roads, you need a license. if you are on your own private road or some other private land, you don't. at least that is my understanding, maybe the code is different in different states, but i remember growing up and friends who grew up on farms said they started driving at 13 or 14 because the land is private.....
i don't think it is a liberal mantra only. and i highly doubt all libertarians hold your views on this matter, just as i doubt all libertarians would exercise caution for others and learn how to fly first. i really don't have a problem with government stepping in and saying look....we need a license to fly and a license to drive because when you operate a motor vehicle on PUBLIC roadways and of course airways (i don't think airways above a certain height are private), then you need a public or government license. IMO, it is minimal intrusion and is offset by the state's compelling interest to better protect the public at large.
further, as a libertarian, surely you recognize a state's police interest under the 10th amendment.....it is an easy argument to say that the state requires license in order that one does not impinge upon the others right to also safely drive on the road or in the case of planes, to fly and live on the ground should one crash.....
your labels mean nothing to me....you can join the ranks of PMP and label away....i will continue to argue my beliefs, as do you....