How can intertextuality actually inform someone about the story?
I watched a YouTube video by GiBi's Horror Homestead where he talked about how the FNAF book Fetch referenced Brigadoon, and that helped inform the narrative of Fetch. I looked up the term for it and apparently it's called intertextuality. I want to use this in my own stories, but I have no idea what it's supposed to inform. I have a character named Jed Dean who's a reference to two Beverly Hillbillies characters, and I would like to inform something about Jed Dean using Jed Clampett, but how would that work? I could reference something about Clampett's distain for Alcohol to inform the player (because I'm writing a videogame), but unless Dean's distain for Alcohol comes up, wouldn't that be irrelevant? It would inform nothing about him aside from his character, which is irrelevant for a character who was created for lore and worldbuilding. And if it does come up, then how would using Jed Clampett be a reference? Dean's connection to Clampett would then be the irrelevant element. I would like to learn how to do this, but I feel like my "It's either said in the story, or it doesn't matter," mindset is holding me back from the actual solution.