The term "simpleton" was unnecessary there, how about normal "can't-drive-because-I'm-not-old-enough-and/or-good-enough"?
That softens the blow a little... but it's like putting a pillow in front of you the moment before the truck runs you over. It still hurts. >_>
I don't beat around the bush. The truth hurts, either deal with or live a sheltered existence. I choose to deal with it.