I'm sure, at some point, folks made jokes about making a simulator game where you played a simulator game. It's not a joke. It exists.
Used to be simulator games were about painstakingly recreating the details of a particular experience. But nowadays seeing the word simulator in a game means that you're going to controlling an avatar that's not human, like grass or a rock. Oh, and you're going to be doing a bunch of weird, wacky quests where the law of physics only work sometimes.