Copyright is outrageously long, anyway. Seriously, who benefits from works after the creator is long dead? AI works won't ever replace a human's level of ingenuity, creativity and imagination, let alone at the spur of the moment. That being said, what it does interrupt based on what we ask from it can be fresh and aid in the development or adoption of ideas we may not have thought of before. Being in the public domain is the best outcome.
Seriously, who benefits from works after the creator is long dead?
Those that lobbied to increase the duration of copyright - the mega corps that have sucked up a whole bunch of copyrighted works and are tightly controlling it to squeeze as much money out of it as they can.