This was interesting to read. But I would have liked to have learned a bit more about the "politics" involved in an academic career.
So your advisor probably shouldn't try to keep you totally in the dark if there are political shenanigans going on in your department or university... but they should do what it takes to ensure that those shenanigans are "not your problem." In other words, said shenanigans should be educational (possibly even entertaining), but not distracting, stressful, or have any other impact on your primary purpose in life: getting your dissertation out the door.