JK Rowling, the proofreaders, the reviewers, the printers, the marketing, the librarians... Everyone in that list is in effect getting stolen from by the publishers, yes.
in the same way that Lebron didn't go where with his own feet, he benefited from coaches, support, doctors, nutrionists & cooks, all dedicated to putting everything into this one man. Do you think merely being a freak of nature nets you a billion ?
Right, and even if we assume Lebron accomplished his entire basketball career by himself and that his salary is 100% “earned”, his salary didn’t net him a billion dollars.