LOL! I love this. Yes, it makes perfect sense. Think of the Magician, he presents all the tools to you: "You can do anything you want!" he essential says, "Be or go anywhere you want!" That's his magic after all, the magic of infinite possibilities. Now you put him behind the reins of the Chariot, which requires a single focus and ambition to get it where it's going...and what does the Magician say? "I could go anywhere? Here, there, over there, or over there...the possibilities are infinite!"
Not only are the horses getting mixed signals--one to go one way, the other another way--but when they manage to go in a direction, they're probably jerked and told to go in another direction, and another, as the magician changes his mind about how to get where he's going. Mind you, it's NOT that he doesn't know where he's taking the Chariot, it's just that he can see so MANY ways to get to that destination.
It's like telling someone with macrofocus, who sees only the big picture to microfocus on a single detail and ignore everything else...he can't. Or like telling someone who loves to multi-task to do only one thing...that no fun. The Magician is great, but he's Mercury--he wants to get things done fast, and he wants to do as many of those things as possible! Time's a wastin'! Cook a quick breakfast, write e-mails, call friends, glance at the morning paper, jot down appointments...and accept the applauds he's going to get for magically getting so much done. Now THERE is a magician! He doesn't want to be told to focus only on getting two disagreeable horses to go in only one direction to just one place. Where's the magic in that?
When you get these cards, the Magician is telling you that your mind is zig-zagging around from thing to thing, direction to direction, idea to idea, possibility to possibility; it's trying to go where it's going "magically" rather than focusing down and just getting there. There's no way that kind of thinking is going to get the chariot to where it's going.