I don't mean it for myself- I mean it for the average person. Fight or flight. Not everyone is trained or mentally prepared to jump in, without equal armament, and attempt to stop an attacker. Even if I'm disarmed, unless a very good opportunity presents itself, I'm probably not going to intervene. Unless my options are dire, such as cower and die, or fight and possibly die, I'd prefer to get the hell out of there and live- if I'm unarmed, that is.