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.
you get this kinda thing in Star Trek and other science fiction a lot, where you have a planet with near paradise appearance on the surface... but then you find out that anyone who so much as makes a suggestion or questions paradise is put into a tube and shot into their sun, it's perfect peace... as long as you know that questioning the peace leads to immediate death.
That ain't paradise imo, that's hell compared to having the ability to say "I fucking hate the way X happens, Y shouldn't be in charge of the governement, this sucks" without getting a knock on my door and bought out to the tubes to "maintain the peace"
Fancy hearing me on an amateur podcast with friends gushing over one of my favourite games? https://youtu.be/1I7JfMMxhf8