Are you making the argument that because the public alcohol ban is misused, that therefor we should also misuse this copyright law?
(I don't agree with you that the original purpose was restricted to protecting revenue. The original purpose of copyright law is to codify the moral rights associated with creative works. Moral rights are fundamentally a property right connecting the work to the person. When we hear that an artist tries to prevent their works being distorted by being associated with a certain political campaign, this is an appeal to this kind of right, not revenue.)