Security is a good use. If you think America would be a better place by completely disarming, think again. In reality, it would cease to exist in short order as hostile nations took it over and parted it out.
Same goes for any other nation.
"A man of peace must be strong."
The truth is that anti-military hippies only ever exist in secure nations that can count on their biggest worry being local crime. There probably aren't any hippies in Aleppo at the moment. They only sprout in secure, walled gardens that are created by the very military forces they decry as some kind of innate evil. Because they are clueless fools.