Pace, I'm surprised I thought you would have been in favour on 14 year olds flying.
I don't see any similarities with driving at all. Haven't thought about legal responsibilty though. I don't get your point re it being double standards, I think the errror is in somehow trying to equate the two?
Consider how 14 year olds fly in isolation of analogies and see if you still feel the same, I can't think of any good reason not to permit it.
BB