While you have a point, I want to believe that such creatures while violent and primitive at first (like we are now) evolved beyond all that bellicose nonsense and acquired wisdom by defeating ignorance (as I hope we do too one day in the far future). So that by now such creatures may be full of benevolence and enlightenment and only seek to further themselves while respecting the universe they live in.
No species would ever be 100% benevolent, because thats statiscally impossible.While you may be more of a peaceful species, there will always be the one that was born a sociophatic, that wants things that are not seen well by the society, and thus he will push back.And some will even resort to violence to get that.And for those, the society at large will need to have some kind of security measures(armies or police with weapons) to keep order.
To everything, there is always the opposite side.Which is why complete peace or complete chaos is simply impossible.
My (locked) thread about how difficulty should be a decision for the developers, not the gamers.