The one-way nature is exactly the crux of the matter. In a purely chaotic world where people do whatever was in their best interest in the short term, everybody would infringe on copyright whenever they wanted a book (or whatever "non-scarce" commodity) and the content producers would do whatever nasty tricks they felt would stop this from happening, including distributing your book in a form that can only be accessed via computers that you don't truly control and "reserving the right" to cut you off from what you "purchased".

We, fortunately, do not live in this world. However, from the standpoint of someone that prefers to purchase books, movies, and video games to promote these arts, it seems that the entities "selling" the content to me are more eager to head down that chaotic road than I am. That's not to diminish the fact that there are many rampant copyright infringers that have already happily moved down that road and could care less about long term benefit. It's just that I am not one of those people, and I don't deserve to be hit with the crap-storm that you intend for them, particularly when there is no evidence that they feel any of that storm at all.

So I long ago decided on a solution, just do what feels right. Buy from whatever distributor you like (I tend to stay away from Amazon, competition is always good) and then circumvent whatever DRM they place on it (for instance, go to one of those places of ill repute and get the book in an accessible format). It's not perfect, but it sure as hell is better than playing the game they set up.