I asked ChatGPT about that and it gave a nicely reasoned explanation on what AI produces compared to humans.

But that being said, the problem I think is that people treat the output from LLMs as final.

It should be treated more as idea generation or early draft to get over the “staring at a blank page” and get the creative juices flowing and creating your own content.

Having purely AI generated content and eventually feeding the algorithms and soon enough every sounds the same (already does in a lot of places).