> Even then a library is still buying at least one book if not multiple.

And someone originally bought the pirated software, too, which they then went on to share with others....just like a library. So what, again, is the difference?

No, of course I wouldn't feel guilt. Do you feel guilt when you buy things secondhand or borrow books from libraries? You're not benefiting the creator and you're shortchanging the creator of the cost of purchase because you don't want to pay full price for a new copy. What's the difference?

> Presumably an author can pick a publisher that does or doesn't distribute to libraries.

As if a library is legally required to only carry books with the publisher's permission?