Actually, The Brave One did way better than Kevin Bacon's competing revenge flick Death Sentence. Maybe the problem is with War-On-Terror gun porno?
You can spend hours dissecting Robinov's idiocy, but the fact is it's bad for science fiction. As Slashfilm points out, the danger is that we'll end up with characters like Sue Storm in the Fantastic Four movies, who's a bride and not much else. Science fiction needs well-rounded, interesting women in challenging situations — not just mindless fluffers for the male hero.