I think it's just next level in the game: when you lie and get caught, how easily can you shrug it off and carry on. Not everyone can do this with a straight face. Politicians can. They're good at that.

All humans lie, whether intentionally or not. Eye witness testimony is notoriously unreliable simply because our brains do so much data compression when recording events and then unreliable, subconscious extrapolation techniques to play it back. That's before we even get to intentional manipulation. There are five lights and all.

I could see how being more consciously aware of the distortions would make one better at manipulating media narratives and organizing complex groups of people. It would seem to have less to do with being a psychopath and more to do with being smart enough about how people work to recognize your own flaws.