Except that it is not well structured, using bullet points does not imply structured writing.
If you were to give me a snippet of your conceivably good AI output I am pretty sure I could rewrite an entire paragraph into one a single cogent sentence. The problem with AI prose is simply that it’s bad in that it has no regard for the audience. It somehow manages to be both incredibly dense and meandering at the same time. I should be able to judge how much information is contained in a post from the number of words, with AI prose this is simply not possible anymore. This all puts the onus on the reader to do extra processing that should have been done by the writer in the first place.