I think it's a problem with anime as a medium/industry in general. My friend group has adopted the term "anime politics" as a shorthand and it really does fit in a lot of scenarios (it also applies to eg marvel movies but we don't watch as many of those). Similar vagueness plagues relatively "political" shows such as Code Geass and Psycho Pass, off the top of my head, and even Legend of the Galactic Heroes, which is probably the best I've seen in this area, leaves something to be desired. I think it must be something to do with the typical structure of anime (a single character or small group likely won't elicit widespread change).