Perris covered pretty much all points.
I free range my birds and I'd never let them out without a rooster. A good rooster is essential for a healthy flock.
If you have a rooster, you can forget about bullies. If 2 hens are fighting, he'll take care of that. If a pullet is chasing young chicks, he will take care of that. If a gluttonous hen is eating all the treats and not letting the smaller girls have any of them, the rooster will take care of that.
With a rooster, I can forget about hawks. I've never lost a single chick to a predator.
I also think it's animal abuse to never let a broody hen hatch babies. It's their nature to reproduce. If they go broody, they must have babies to be happy. At least once a year, a broody should be let have babies.
I also think we should learn how to cull. I find it to be extremely hypocritical to pay someone to do the filthy job and eat the meat someone else killed. If I ever lost the will to kill an animal for meat, I'd go vegetarian because I can't stand the idea to eat meat without being able to do the deed myself.