I've seen Leni Riefenstahl's work and Michael Moore is no Leni Riefenstahl!
I have only seen bits of Mickey' work. His show on cable stunk on ice. What little I have seen, made wonder what was the big deal. I have seen film school students due much better with less cashola. So, based on what I have seen of his work, I agree: he is not qualified to shine Leni's shoes.