Some countries allow 9yr old girls to be married off it doesn't make it any less deranged, there's no reason for civilians to be expert marksmen with a wide arsenal of weaponry.
That, my friend, is not the riposte you probably hoped it would be! If the law allows a citizen to own firearms it would be in everyone's interest for those owners to become experts at handling such weapons, with comprehensive knowledge of gun safety at the forefront of such matters.