I don't know that I'd agree. Perhaps at one time this made sense, but now, is anywhere truly safe, as in not needing some way to defend yourself? Churches used to be safe. Grocery stores used to be safe. Homes used to be (reasonably) safe, but now even homes in "good" neighborhoods are targets for home invasions. So unless you're planning on living in a cave in the Himalayas or something, the potential for having a reason to be armed is going to be there.
It's not about being a safe place, it is about not letting the gun take you to places that you would not otherwise go as that will bring trouble. Be situationally aware and don't go down that dark alley because you have a gun... I will always have the gun. I don't go places that cause my spidey sense to go off, just because I have that gun.
In other words, don't go looking for trouble, but if it finds you be prepared.