You cast the unreliable narrator as a benign character. While this may be true, there are also unreliable narrators who are malign, to a greater or lesser extent. In most postmodern literary fiction narrators are, to some degree, fallible - this makes for more inherent mystery, conflict, and surprise than the omniscient narrators of most premodern and modern literature. But some are far from benign - they are deliberately manipulative, dissimulating, or downright mendacious. Nabokov’s narrators often provide prime examples of such techniques. I fear that your thesis in application to our present predicament may be rather questionable, particularly as control of the narrative in an intelligence and information warfare context cannot be ascribed to wholly well-intentioned parties.