I think more different kinds of organizations have started doing SAFe than you think!
I agree that both real priority shift / additional information based changes and also politically and paranoia motivated changes occur, but I don't think it's as straightforward or obvious how to differentiate one from the other as you seem to be implying. I'm sure many of the clear cut priority shifts based on new information to me have been the obvious politically or fear motivated changes to other people with different context than me.
Personally, I just think a better solution is to prioritize detailed work immediately before it is done, whenever possible.
I agree that both real priority shift / additional information based changes and also politically and paranoia motivated changes occur, but I don't think it's as straightforward or obvious how to differentiate one from the other as you seem to be implying. I'm sure many of the clear cut priority shifts based on new information to me have been the obvious politically or fear motivated changes to other people with different context than me.
Personally, I just think a better solution is to prioritize detailed work immediately before it is done, whenever possible.