Show me a spoofy historical comedy written seriously where the author defends it as historical fact.
The most seminal example is Orson Wells's "War of the Worlds", which set off a full panic across the Northeast Atlantic when it was broadcast. A more modern example is American Hustle a dramatic (ultimately falsely embellished) comic retelling of the Abscam scandal. But there's an entire genre dedicated to falsified history from a comic perspective.
Then there are much more sincere takes as well, some of them extremely old and compelling enough to be considered true for centuries. Case in point: https://en.wikipedia.org/wiki/Historia_Regum_Britanniae
what you have presented is a logically impossible loop
Lying is impossible? Getting historical events wrong for the purpose of improving the entertainment value of a media product is impossible?
Are you joking?