The notes are to make the game longer and explain backstory. If you don't want to read them, then don't. Plus those notes explain what happened in the past, like how people have died. Expanding the story from the start would be boring, as everything would be explained from the start and there would be no point of completing the game and that sense of finding the pages and reading them for fun would be lost. If I already knew everything I wouldn't read the pages. But just my thought on it.