It’s like someone claiming that they drive instead of fly because of the possibility of crashing. If avoiding a crash is the goal, then they’d be better off flying than driving because you’re much more likely to be in a car crash than plane crash.
Likewise, if keeping your family safe is the goal, then not having a gun is better than having one, because your family is much more likely to be hurt with a gun in the house than without one. Basically, the goal (family safety) is at odds with the solution (owning a gun), since owning a gun makes the family less safe.