I would say the opposite. Yes, there are mean roosters. But those are the ones you hear about. You simply don't hear about the nice ones. Many of us have nice roos. The avatar roo you see here is Jack. He was the patriarch of many birds in my flock. He was not human aggressive. Not aggressive to my dog, or to other birds in the flock. He was not even aggressive to cockerels who were left in the flock with him. He loved his ladies, found them nice nest spots, and would fluff up the nest bedding for them. He accompanied his ladies to and from the nest box when they were out to free range. He loved his babies, and tidbitted all the birds in his flock, including the teen age cockerels.
Jack's replacement is Goliath. He is a huge mahogany red Buck Eye. And he is showing every promise of being as good a roo as Jack was.
I don't make pets of my roos. They know their place. From the moment that I know a bird is a cockerel, I adopt a hands off and an arm's length away policy. IMO, this is the best way to raise a roo who is not human aggressive.