Also, for most of human history, artists were funded by doing commissions. People wouldn't create music and movies for their fans, they would do it for the millionaires who could afford it, a la Once Upon a Time in Shaolin.
As for programming, maybe you don't care about your IP, but your company sure does. How would your company be funded if anybody could download its product? A few products might be able to survive just by being developed just for government contracts or for other large companies, but any care for ordinary consumers would be gone. And there is no similar market for books. Sure you could set up a book-writing company like you could now but where would the money for those salaries come from? No one will pay the company for a book they can download for free more easily.