Are the number of responses by ChatGPT to a given prompt infinite? I suppose that even monkeys at a typewriter can't produce an infinite number of different books, even if that number is really, really large (hello, Mr. Borges). But, I assumed (without a lot of subject matter knowledge) that the number of possible responses was actually much less than just randomly typing keys, because it's picking words from a frequency table. Again, I have no idea what I'm talking about.
There's randomization, but the random aspect lands you on a root node and branching structure for filling the text. Given enough tries (you just keep running the same prompt with different starter "seed" values), you'll get something out that seems like quality.
What's doubtful is whether the people attempting this are good enough writers themselves, or educated enough readers themselves, to recognize it when it falls into their hands. I suspect the Venn diagram for the two groups of people doesn't overlap all that much.