In other contexts I would consider it too crude and obvious and simplistic to bother with, but in that context – where there is a huge amount of repetition of myths and fictions treated as facts – it makes a useful point. The mere fact that something is written down in a book doesn’t make it true. No matter how many times how many people repeat that it is true, and holy, and a sin to deny – none of that makes it true. Repetition is just repetition. Advertising and political manipulation work the same way.