Sure once your gone the baddie might go for a easier prey but lets face it you wanna live and you have not been in the situation yet to acually fear for your life from someone assulting you. Neither have I. if I could find an opening for running then im out period, no what abou the next victum i wanna live... and besides
you could run to a police sation and describe the man and the police could be on a lookout. you dont have to beat the guy to resolve conflict, aikido is about using nonviolence running is nonviolent, and if i dont have faith in my technque then im better have more faith in running eh??
oh by the way if someone has a firearm studies show that if you run away you acually have a better chanch of survivle. untill then peace.