Copyright is about copying. For instance, if I buy a book, I cannot distribute copies of that book. But I can write whatever I want in the book, change any of t

Copyright is about copying. For instance, if I buy a book, I cannot distribute copies of that book. But I can write whatever I want in the book, change any of the text in it, provided I don't then copy the modified text. They own the copyright to the intellectual property, not the physical item you are given or the bits in your computer's RAM, which you are free to do as you please with.