When I was in school, writing "in my own words" was never an excuse to not cite a source. It was actually something that took me a little while to understand, it's the source of the information that needs to be cited, and that's not limited to literal quotations of someone else's writing.
That's more an argument for why you can't just use LLMs as a source of truth. Conveniently, LLMs like ChatGPT do often cite their sources, especially if you prompt them to.