So, needle in a hay stack sort of thing. Dude writes a book that says a few truths. He also accurately predicted how he'd end up dead. That means he was a spook, himself. One part of that book was highlighted so as to draw emphasis on what it says regarding that subject; a subject Q covered in many drops.
Since Cooper was a spook, and like other spooks, tossed a few truths in with all the fiction and distraction stories, his was made an example of to show anons how to pick out the truths from the fictions, and who's really behind them.