But then the author makes one mistake after another.
First, he conflates the use of currency with fiction. Currency doesn't need fiction to function, it can be survive even if every human was completely rational and couldn't be tricked with fiction. That's because the mechanism that gives currency its value is game theoretic equilibrium / focal point.
Then he starts complaining that bad guys use fiction. Come on man, you just explained that humans are inherently wired to follow fiction, so why are you blaming people for using it?
The author also goes into political and moral arguments and starts taking sides. Given that both sides of any conflict use fiction, this seems out of place.
Finally the author encourages people to read scientific literature, without explaining how to identify the rare thoughtful writing among the tons of fiction that academics write. Academics, after all, aren't stupid, and also follow the approach of writing fiction into their papers to make their work more impressive to the outside world and more appealing to journal editors.
Overall, I'm very disappointed since the topic is important and deserves a better treatment.