If I use your copied credit card to buy software, all that happens is (a) some bits get written to my computer's hard disk and (b) some bits get written to a Visa or Mastercard server's hard disk. Why would you get upset about that?

EDIT: ok, it's fun playing obtuse, but more seriously it is also very obtuse to pretend that intellectual property is not property. I think you have to be pretty stupid to not understand why an author who spends a decade painstakingly creating a work of literature is entitled to ownership of reproductions of that work.

It is not playing obtuse to think "I also have a copy of an ebook" is different from "I have literally stolen your property".

Unless the contents of the ebook are my property, in which case you have stolen my property.