So no one ever buys the hardback versions and feels exactly like you do and wants to keep their sets looking similar?

Hardback are more profit and sturdy/lasting. There are a large number of people who want books as soon as they come out, desire first editions etc and will pay the premium. You choose not to.... but you are not the main character in the publishing world.

>I don't understand why publishers do this.

Really? Perhaps a book on critical thinking should be your next trade paperback purchase.