I think people forget the reality when they take their supposedly brave and oh so altruistic stance of "there should be no copyright".
When people already know they won't even have a small chance of getting paid for the art they create, we will run out of artists.
Because most can not afford to learn and practice that craft without getting any form of payment. It will become a very rare hobby of a few decadent rich people who can afford to learn something like illustration in their free time.