Aleatoric music is mostly just "neat". I've never encountered any of it that is interesting or moving, with the exception of situations in which it is very carefully integrated as one small element of a composition. That includes the likes of Xenakis, who I think writes music whose main form of enjoyment is reading how it was composed. After doing that, listening is an unnecessary and often off putting step.
I have a set of "story telling dice" that you toss and use the result as a writing prompt.
High entropy has existed in other forms (as you point out) before LLMs.