If you are trying to write a blog/essay/etc on a topic, it can help with “writer’s block”-you may know a lot about the topic already, but struggle with putting that understanding into words. And then it isn’t hard to filter ChatGPT’s output based on your pre-existing knowledge.
Sometimes I don’t know the answer to the specific question I am asking it, but still have enough background knowledge of the topic to pick up when it is likely to be “hallucinating”