Right, you understand the picture now but it would mean nothing to you when you first saw the picture before playing the game. Same thing with previews for movies. When you see the previews it's just a bunch of random events in a short to make you want to see the movie. After seeing the movie watching a preview makes you realize that they took some of their preview material from crucial scenes in the movie, but because it's a preview, you don't know that they are crucial scenes.