That doesn't follow. Predictability is your brain reacting to the lack of novelty. What an LLM produces is a chain of words following some kind of conditional distribution, whose output could vary significantly from your understanding of novelty depending on its training and priors.
With a single, generalized prompt ("produce something unpredictable"), ChatGPT responded with:
> 00:— / ANOMALOUS RESIDUE > Vekh. > Ìssara. > Nnnn—tq—èl. > > A temporary thickness enters the meat of the signal. > > Not rain. Not a substance with permission to fall. > > UL / 9 / ferrous / ∂ > The measurements are eating each other. > > Someone has left an entire childhood in the wrong unit of pressure.
That is not predictable to me, at least. It could be boring, but I think that is mainly a product of me knowing where the text is from. LLM-generated text is inherently boring, to me, but that has nothing to do with predictability.