I'm really not trying to be mean, but one of the things we learn in the humanities is that basically any two texts can be connected via extremely broad statements (e.g. "Perfect is the enemy of the good"). This is like the joke on twitter about how every couple of years someone in tech invents the concept of public transportation.

Yes, exactly, "extremely broad". English isn't just built up of individual words, but phrasal verbs, idioms and sayings, so it is inevitable some of these will repeat. (Even before AI, hack writing relied on clichés, repetition etc and downright plagiarism.)