There's an old idiom there are horses for courses and it rings true for A.I. generated articles and stories. For the most part a LLM could do most if not all of the heavy lifting a sub editor would otherwise have to spend time ensuring the submitted article by the author(s) meets various requirements. But even sub editors are known to make mistakes changing words and sentences without being immediately obvious the broader meaning / implication has changed, especially in regard to technical writing.

Creative writing is IMO a different ball of wax. If one is aiming for cliche, by the numbers, formulaic humdrum that's a dime a dozen and marketed to readers as simply an unmemorable time filler or just something cheap to fit into a remarkable expensive cover that plays its part in an impressive book collection, then generated content via a LLM will suffice. On the creative side I'm confident in time better LLM's used will utilised to hide the nature of the authors.