What I don't understand about this example with Hyperion is

a) Wouldn't Hyperion's orientation be influenced much more by Saturn and its many moons on their many orbits than by dust and photons?

b) Wouldn't it then boil down to "just" an n-body problem (for which we know no closed form predictions exist -- yet is still perfectly "classical" in nature)?

In other words, why involve dust and photons and wave functions and entanglement when the answer could simply be "it's an n body problem so we simply can't predict its orientation"?