That’s sheer cultural ignorance, and I see it a LOT in people I know under 25. I have a 19 year old nephew and a friend who’s 24, and the things they’re utterly (and, weirdly, proudly) ignorant about are legion. Star Wars? Ghostbusters? Indiana Jones? The Beatles? Any movie made before 2005 or so? Those are for old people. To them the only media that matters are video games, YouTube, and Japanese/Korean animation.