It seems to me it's the hardest thing 'cause you're starting from nothing and creating something. Everybody else is interpreting what you've written. Everybody else is an interpretive artist. Even the best of them. Stanley Kubrick was an interpretive artist. The best actors in the world are interpreting what's on the page, and they use it as a springboard to something else, but if it's not there, there's nothing to spring from. So the writer is the only person who's taking absolutely nothing, and 120 pages of it, and dirtying it up in such a way that it's gonna gross hundreds of millions of dollars and make a lot of people happy.
Screenwriter Paul Guay in the documentary Dreams on Spec