I have a copyright on information I have created, but would never enforce it because I want it to be free and consumed by both humans and AI
I'm also not sure what you mean by "laundering", though it seems like there is the prevailing belief among a subset of artists that the AIs are regurgitating their works (which would be a copyright violation) rather than just incorporating them into their world representation (learning, fair use). While there have been instances of the models outputting certain texts, we have not seen a new story about this in awhile. There are multiple remediations for this issue. I don't find banning copyrighted material from learning material a good one. It's like book banning in schools if you ask me