So if people come together and help each other, you won't need the weapons. Engineers seem to understand making backups and hoping you never need them, why is

So if people come together and help each other, you won't need the weapons. Engineers seem to understand making backups and hoping you never need them, why is this different? You have the means to protect yourself, and pray that you'll never have to use it. (I am not a gun owner, by the way. This just seems perplexing)