I personally think no knowledge can be gained by understanding yourself. That’s a very Buddhist thought you’re entertaining. To the Buddhist, any claim to knowledge is what they’d call “Ignorance.”
Personally, I think literature is grounded in forces outside of itself, and shows existential causes and effects that can be related to what we see and observe today. It’s meant to show and forecast the effects of certain actions, and whether the effects are just or unjust.