Yes, like many industries I have worked in I can imagine that they are unable to cooperate because of petty greed and short-sightedness: they would rather have the whole market taken away from them than endure the possibility that some of their direct competitors get a small, temporary advantage.
It should not be hard to create truly interoperable systems that can cut Amazon out of the equation. It isn’t a technology issue. We have technology that easily solves every conceivable aspect of distributing, paying for and consuming ebooks.
This should be the ultimate opportunity for the publishing industry. Especially given that Amazon isn’t investing much in development of devices.