Guns protect against lone predators, burglars, rapists, gangs and hordes of various sorts, zombies or otherwise. As a practical matter there is little difference between a zombie who wants to eat your brain and a criminal who would bash it in with a brick. Guns either repel them or dispatch them to an appropriate destination.BTW, isn't a coward someone who lives their life in fear? Especially irrational fear?
Anyway, more on this topic here