This would cause problems for text-to-speech used by the blind... a machine reading her work and then plagiarising it, reading it out loud to someone? THEIVES!
I remember this being a big area of interest about 15 years ago, but there doesn't seem to have been much about it lately. So long as it's done in real time and just for the reader, and not an audience, I would be inclined to say that it's not infringing the reproduction right, derivative right, or most significantly, the public performance right.
As for training LLM's, honestly I don't see that (outside of bugs or faults in that software where it inadvertently and not by design, regurgitates training data) the output of an LLM is anything more than an opinion or review, and hence not a 'derivative work' of any kind. And, therefore, it should be considered fair use. Not a lawyer but I wish I was because its basically a license to print money.