There's also a subtle point here about accessibility of creative works that I think is often missed -- copyright, as a social contract, exists because society h

There's also a subtle point here about accessibility of creative works that I think is often missed -- copyright, as a social contract, exists because society has a reason to provide creators with a period of economic exclusivity in exchange for the release of the work. There's no natural or defensible "right" to prevent people from copying. If a creator chooses to release their work in a format that they can retract (e.g. they can negate the societal benefit of the release), society is under no moral obligation to respect their copyright.