The book publishing industry goes about their goals rather differently. Comparing the book industry and the movie industry makes as much sense as not buying wine because you're upset about the tobacco lobby (or saying that you can't criticize the tobacco industry if you're willing to buy wine).
They really don't, especially not anymore. For-profit book publishing has turned decidedly Hollywood. I've worked in both book publishing and in Hollywood, and people often forget that they are really one in the same now. CBS owns Simon & Schuster, HarperCollins is owned by News Corp, and Penguin Random House is owned by Bertelsmann, one of the world's largest media conglomerates.
How are they different? They both support long copywriters, support DRM of digital media, etc.
Two important ways: first, they're happy to publish physical, analog books, which the movie industry no longer does. That allows institutions like libraries and used-book stores to exist. Second, they've never put a rootkit in their DRM.
The movie industry also creates physical disks that you can trade but they have had copy protection since the analog era.
You could go to the library for a book.
You can go to the library for a DVD....
There are tons of good books that are in the public domain. Lots of self published good content. You could also listen to music which has tons of free sources like Jamendo. You could also create your own amusement by learning a skill or crafting.