Let me draw you a clearer picture. A man with a gun stands across the street and threatens me. Draws his piece and points it at me and fires. I can't outrun that bullet.
Now assume he draws a knife. Big one. I've got a thirty foot head start to get in my car and flee or get in my house and lock the door or a number of ways to try to escape.
Clear? Guns are more dangerous than knives.