Comment by tpmoney

Copyright doesn’t cover facts and methods. It specifically covers creative expressions. That’s why patents are different from copyright. If you read some woodworking books and then write your own online tutorial about building a chair using the methods and procedures described in that book, it doesn’t matter that you now compete with the books that you used, provided you didn’t copy the creative elements. How much of a chair design is creative and how much is function is an ambiguous question that might still land you in court, but it won’t be over your right to make the tutorial in the first place.

As the judge noted in this ruling, copyright isn’t intended to protect authors from competition. Copyright doesn’t protect Rowling from other authors writing YA wizard books cutting into her revenue streams. Or from TV producers making YA wizard shows that reduce the demand for books. Copyright doesn’t protect the Tolkien estate from Terry Brooks, or Tracy Hickman or Margret Weiss reducing the demand for Tolkien fantasy by supplanting it with their own fantasies.