JK is a talented and hard working writer, and though I'm not a fan personally of those books I respect that they likely are great pieces of work, but I believe we are getting the scraps of what we could get in the Intellectually Oppressed world compared to an Intellectually free world. I'd rather have a world without cancer, a world with 100x more people able to provide medical care, a world with less pollution, than a world of artificial scarcity where a few who go along with a system of oppression get to be billionaires.
So not imaginary wizards then. What should be regulated? Is it nothing? Does your statement become "Our government should not be in the business of regulating the distribution of a sequence of words"?
Yes. Your lungs is a tree that needs healthy air. Your brain is a tree that needs healthy ideas. When people are not free to clean the ideawaves, they fill with pollution, and that is where we find ourselves.
Maybe the state could grant protection for 10 years after publishing to give the author a chance to recoup their investment. I don't know why the protection extends to the author's grandchildren.