I understand copyright law is what allows individual artists to make a living under the currently dominant ideology, it still doesn't change the fact that materially it doesn't make sense and it's an entirely ideological construct. Even today under capitalism electronic devices, storage on those devices and bandwidth to get data to those devices via the Internet is really cheap, this is proven by the fact that lots of people in extremely poor countries have smartphones and an Internet connection even when they don't have basic amenities like proper healthcare or education. The vast majority of the world population can have pretty much any kind of digital art in the palm of their hands very quickly for essentially free, the current material conditions allow for this, it is why piracy exists, it exists because it easily can exist.

Copyright law is here only to impose the dominant ideology onto the essentially post-scarcity digital world and for that to happen it needs to introduce significant inefficiencies in the distribution of digital goods that are materially extremely cheap to reproduce after the initial cost of making them.