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In my case it's difficult for me to imagine a movie I've really liked, but then finding out that I admired the director's interviews even more.
I've really only loved 6-8 directors, and I've heard most of them interviewed. But I still love their films more so than them talking about them.
I will say this: experienced artists of any type, directors included, are experts at intellectualizing their art. They can do it until the cows come home. It comes with the territory.
I had a friend who was professor of sculpture at a Calif. university. His sculpture was nothing that special, but he could intellectualize it ad infinitum. He told me privately it was all b.s., but that one had to learn to intellectualize convincingly in order to fulfill the requirements of the university.
Since facts are in short supply in artistic endeavors, it allows for unlimited intellectualizing. And that is how an artist can paint a single line on a canvas, and expect to fetch big money for it.