First of all, copyleft and uncopyrightable are entirely different things.
Second, if something is a derived work of a copyleft work, then either it must also be copyleft, or it’s simply infringement and entirely unusable. You’re suggesting that AI remixing can effectively “remove” the copyleft, but it would be entirely unjust (and more to the point, contrary to established legal precedent) for it to work that way.
First of all, copyleft and uncopyrightable are entirely different things.
Second, if something is a derived work of a copyleft work, then either it must also be copyleft, or it’s simply infringement and entirely unusable. You’re suggesting that AI remixing can effectively “remove” the copyleft, but it would be entirely unjust (and more to the point, contrary to established legal precedent) for it to work that way.