LLM’s are usually unexpected only when they malfunction and sprout same letter again and again etc - hardly a literary masterpiece. They make very easily recognisable patterns that we can use as helpful tools, but in the end they are devoid of any meaning apart from what we give them. Of course one could say same about art and all language, but I think there still is the fact that we apes somehow recognise each other. And besides, we do know the internal functions that drive the parroting. It is admittedly bit tricky, but in no way as magical as people purport it to be.
You seem to believe, on a more fundamental level, that LLMs are simply not capable of producing text that has deeper connections to itself or represents abstract thoughts. In my opinion, 99% of text written by humans does not show this, just as 99% of text produced by LLMs does not show this, but both have the capability, and I don't believe that LLMs are constrained in such a way that they can never do this.