Intentions mean nothing? On the contrary. If my intentions are honorable and benevolent, you are safe even if I am packing an M-60. If my intentions are psychopathically homicidal, you are not safe even if I am unarmed.
If some psychopath with homicidal intentions approaches the playground to kill the children, you'd likely end up being darn glad I was there with my Glock 19, because I'd stop him or die trying. There's the diff in intentions.