The issue is that the AI shit is flooding out anything good. Nearly any metric you can think of to measure "good" by is being gamed ATM which makes it really hard to actually find something good. Impossible to discover new/smaller authors.
Scale matters. The ability to churn out bad writing is increasing by orders of magnitude and could drown out the already small amount of high quality works.
While it's true that the volume of bad writing is increasing, our ability to analyze and refine this sludge is also improving. Just as spell check and grammar check give instant feedback why not AI instant feedback about writing quality / originality / suitability / correctness / … ? If instant feedback can improve spelling and grammar why not these other things?
Doesn't mean anyone buys it.