If the authors dont disclose to publishers they cant know too. For authors they get pressure to write faster because everyone is atleast AI assisted.

TBH i dont care if its AI written but the result of AI writing is sloppy. Lots of fluff and weird wording. Also sloppy research is likely as AI spits out facts and the authos dont have to look into the source anymore. Peer reviewing must become stronger and will be a quality sign for publishers in future.