Your logic is flawed. Lets have a look at the following scenarios and see where I become an evil person.
Scenario 1: I buy a second hand book from an op shop (I do not compensate anyone who produced that item). There is no theft involved, all perfectly legal.
Scenario 2: I borrow a book from the library (again I do not compensate anyone that produced that item). Again all legal.
Scenario 3: I give/loan a book to someone else to read. (Yep, nothing wrong there)
Scenario 4: I give a copy of a digital book I have to someone else. Oh no I'm a thief, someone didn't pay for a copy call the FBI! The costs of the digital download are $0.01 per copy. There are no printing/paper costs and very little distribution costs yet I'm expected to still pay roughly the same price as I would if I bought a hard copy. Due to DRM, if I wanted to loan my digital copy to another person, I would need to hand over my ebook reader. It is expected that if a second person wants to read that same book, they need to buy a copy for themselves. Don't you think (considering what I can do with a hard copy that obviously costs something to create) this is could be evil or greedy?
The reality is digital distribution is impacting on the market monopoly publishers/middle men had on media. They want to keep their profits up but digital copies affect that. The one digital copy I make of a book can be easily passed to 10 friends in a matter of seconds, they don't have to wait to read the book. Is this a bad thing? For the author, not really. If I really like a book, I'm going to tell my friends. If I have a hard cover and am still reading it, they will have to wait until I finish and might loose interest in bothering to read it. If I can give them a copy then and there, they are more likely to pick it up and read it themselves. Marketing in this form is very powerful. With the digital age, an author can bypass a publishing house completely and sell their next book directly to their fans.