Directing is an art, and if you don’t have an innate talent for it, then you won’t be any good at that. The best film schools and education can’t change it. It’s no different than painting or sculpting; if you can’t do it, you can’t do it.
However, what the best film schools can do is teach how to take whatever latent talent you may possess and apply it to the best of your ability. Of course this is not a guarantee – even the University of Southern California, the University of California at Los Angeles, and New York University, largely considered the three best film schools in America can’t guarantee that you’ll be a rich and successful filmmaker. But what they can do is give you the tools to get there.