- software tools are cited (you often will site a paper describing the tool). If a tool generates a value and then later a bug is discovered, it's important that the tool was cited.
- one purpose of a citation is to make a clear distinction which work/words are your own and which are not. Are you making a statement because it's based on past work, your own inference, or the hallucination of a LLM? With ChatGPT it's easy to get confused
- there is also the more general issue of academic integrity. You shouldn't submit other people's/machine's words as your own
Maybe more correctly ChatGPT should be on the authors' list ;)