It's still a trap. When you copy and paste your content into the iBooks software, you instantly hand over all the distribution rights, as part of the terms of an EULA of a consumer product. Sure, this is the kind of thing that the record industry does if you sign your band over to them, but this is a consumer product we're talking about. This is far beyond what a consumer should expect from such software. If Apple wants exclusive distribution deals, it should make people sign for it so that both parties are completely aware of what they're getting into.
And the iTunes business model was never about exclusivity. You can buy most of the music on iTunes elsewhere. (There is some exclusive content, obviously, but it is the exception, not the rule.) And, most importantly, the deals negotiated to get music on iTunes are done the old fashioned way: as a mutual, signed agreement between Apple and the labels in question.
I don't think you understand -- they're only restricting what you can do with the output of the program, not your content itself. You're free to copy/paste it into any other tool and distribute the output of that tool.
And the iTunes business model was never about exclusivity. You can buy most of the music on iTunes elsewhere. (There is some exclusive content, obviously, but it is the exception, not the rule.) And, most importantly, the deals negotiated to get music on iTunes are done the old fashioned way: as a mutual, signed agreement between Apple and the labels in question.