Because it's David Cage's creation, not your's. You are absolutely free to not care about the game, but Cage isn't obligated to make the game "political." And hell, if he doesn't feel strongly about the potential political nature involved, I'm GLAD he's not trying to force it - that would just end up reckless.
Exactly my sentiments. Why does the game has to be what you want? It's the story he wants to tell, and he doesn't have to make it political...a story could be just, a story, you know?