Being fit doesn’t do anything against a knife or a fire-gun, is not being a coward, it’a just the logical conclusion. The people who want to stay fit in order to potentially fight burglars/thieves are doing it wrong, they should train in either gun use or how to better handle a knife. And, of course, have an expensive lawyer at the ready in case something goes wrong and you actually get to physically hurt said thief/burglar.