Perhaps what this is pointing out is that a lot of writers of the genre of "fantasy" produce mostly formulaic, trope-laden piles of crap that AI is pretty good at mimicking?
It does suggest that publishers might want to screen new writing with a quick "Did AI write this?" and only publish the ones where it is obvious to humans that AI did not write it.
This is neither new nor news. "The Well-Tempered Plot Device" is almost 4 decades old (see: https://news.ansible.uk/plotdev.html).
It does suggest that publishers might want to screen new writing with a quick "Did AI write this?" and only publish the ones where it is obvious to humans that AI did not write it.