Why have lies about Oda Nobunaga's image been told for so long?

Images of Oda Nobunaga were created by novelists from the Edo period to the Showa period. In modern times, what are historians doing? Hey, did you know Nobunaga was kind? Hey, did you know Nobunaga listened to people? Hey, did you know Nobunaga preferred people who worked hard over those with natural talent? Even though it's properly introduced in history, how do falsehoods prevail? I'm complaining. [This is a complaint from Terumoto-chan, who appears in the novel "Nobunaga-chan's Lie."] Novel "Nobunaga-chan's Truth: I Will Re-educate the Wrongly Raised Nobunaga to My Liking" [Written in a comedic tone] Novel "Nobunaga-chan's Lie" [Serious without cheats; a circle work for history enthusiasts] If you don't mind, please read it once.