Having a gun is safer at home
If you live in a country where guns are banned then its possible for someone with a knife to just kick your door in and stab you to death. Even if you know he's breaking in the door you can not do anything but sit and wait. Especially if you are a female and the attacker is a large male.
However if the female in her apartment or house has a gun she can shoot the murderer before he is able to kick the door in. This is true even if he has a gun because he is at a massive disadvantage by being the one breaking into the house where he does not know exactly where you are positioned. You would already have him in your sights.
People from Europe often say they wouldnt feel safe with people being able to own guns but I actually feel the opposite way. It definitely evens the playing field.