Maybe he did it for the lol's, or to own his political opponents, or maybe it was just a mistake he locked himself into. All of which sound just like him.
Rockets don't fly and electric cars don't drive if they aren't built right, which puts a floor on the IQ of the man who is that involved and hands-on with it. Being early in a major startup is a big deal, never mind a whole string of them.
He may or may not be weird or an asshole but he sure ain't stupid.
EDIT: I've been on the fence about this guy ever since I read his most recent biography, but it's really hilarious how saying something even remotely positive about him brings out an crowd who is enraged at his very being and the notion that such a thing as competence might exist.