The idea copyleft doesn’t need copyright has been dead since TiVo, you need copyright to ensure people’s freedom, if you simply repealed copyright laws you would still have your rights as a user trampled.
The problem in this case is the AI companies aren’t ignoring copyright and then releasing their output with no copyright, which would happen in a copyleft or copyrightless world.
They instead want the benefits of closing their output but they want the benefits of taking other peoples work to make that output.
