During that education, I was able to influence some decisions about the film, but I was unable to influence the ending or how much would be cut for the theater. From the approximately five hours of film in the original footage, only about two-fifths emerged from the cutting room. The death of Thufir Hawat. That's only a partial list. This may happen because Dino wanted a longer film all along.
Creation takes risks and that's the movie industry's dilemma.
It's why so much control over creativity is in the hands of noncreative people. The reasoning behind their decisions is enlightening. Don't condemn this out of hand. If investors had not been found to put up about forty million dollars, Dune would never have been filmed. And all of the essentials in the book are on film, even though all of it did not get to your screen.