Try it for a text that is in the training data, or the public internet, or can be put into the context window - then it might help.
My point was that I would be very hesitant to rely on ChatGPT as an assistant in a real literature task. Many of the texts on my Eng Lit course are in copyright, as is all of the module material (the OU's course-specific textbooks). The hallucinations are a real show-stopper.
Give me a break, it's a hammer. This is a perfectly normal "use" of ChatGPT and a good example of how a literature student may opt to try and use AI to make their work easier in some way. It also conveniently demonstrates some of the shortcomings of using a LLM for this sort of task. No need to call them a dumbass.