Many of which conflict. Many of which I had to study before I found a method that worked for me. So I went through dozens of manuals, interviewed several highly experienced teachers and studied some of the best screenwriters in the business, seeking the basic elements upon which most of them agreed. But think of a painter preparing a new canvas. He must secure it to the frame, stretch it, etc.
Every human being on earth has a spine.
The addition of blood, muscles, flesh, hair, etc. makes us unique. The very same thing is true of scripts. Dramatic structure simply offers a spine, a skeleton. The layers that you, the writer, add will make your script unique.