You can learn a lot even from seemingly stupid/mundane things. Like Seinfeld, it’s not educational but how many tidbits about life and culture can you pick up from it? You learn there was a popular drink called Bosco, there is a brand of snack cakes called Entenmann’s, you learn things about the JFK assassination on the Keith Hernandez episode, you see a parody of George Steinbrenner and learn he was the manager of the New York Yankees, people retire to Florida and live in crazy retirement communities, just to name a few. There is a grain of truth in most jokes. But you can’t learn everything from watching TV/movies.