if he's clearly too stupid or too lazy to work at being a better qb, i don't know that he'd ever figure out being anything else, either. if you sign tebow, you throw away the playbook, tell your line to pass block, and let the skill guys play sandlot. he can't figure out an offense. he can't make reads. he can't throw when the play isn't broken. and he's shown no evidence whatsoever, in his entire career, of attempting to get better at any of those things.
it's massively entertaining to me, how many people want to ignore that the mental aspects of the game, in one way or another, are completely out of his grasp. you can't fix stupid.