[dragonwriter]

> In a real street fight situation you also don't know if the guy is going to shank you, so most arguments about "which style is best" kind of go out the window at that point.

Well, appeal to non-lethal sport competitions to settle those arguments go out the window, but martial styles intended for real use (including lots where the unarmed subset has been popular in sport) tend to teach both techniques for dealing with armed opponents and techniques for using weapons (including, often, things that stand in for improvised weapons) -- because that's a pretty big factor in serious fights. Purely unarmed intended-for-use-in-anger martial arts are a rarity.