I think that if this is your opinion, then you've been over-exposed to the crowd that uses the site for its meme-iness, or people that don't understand the purpose of the site and try to use it to support bad arguments. That's obnoxious. But the site's an amazing resource for production trivia, and often a great jumping off point for literary analysis. If ever there's a part in a story or movie you didn't quite understand, then it can help point you in the right direction (or at least reassure you that everybody else is just as mystified as you). Or maybe it helps you remember a movie that you've long since forgotten, but remember a specific moment vividly. If you have a burgeoning interest in writing, then it offers great examples for how to use complex literary devices, or to at least cross-check if your "totally original" idea has been used before, or maybe even accidentally cribbed from some other work subconsciously. The site, just as the tropes it describes, is a tool. Anything beyond that comes down to how well or how poorly that tool is used.