NorthSouth, one could equally argue that flying is much more complicated just because you have to cope with all three dimensions. Also, although planes don't regularly pull out in front of you, they can and sometimes do. And...you have to deal with changing weather, taking time to talk on the radio, and changes of plan - there's been at least one case of a first solo where the student had to be diverted to another airfield owing to an accident on the runway of the home field. And if the going gets tough, you can't pull over and stop for a bit as drivers can. I could go on, and we could argue this for ever... But as I see it, Genghis was making the point that there is no obvious reason why learner drivers and student pilots should be treated so differently with regard to flying/driving solo. So the original question is very reasonable.