Any time you free range they are vulnerable. There are stories on here where a hawk of fox grabbed a chicken within 10 to 15 feet of where a person was standing. Being out there helps quite a bit but they are still vulnerable. You don't get guarantees.
It's not always the predator you expect either. Hawks, owls, and eagles do pose a risk, even when in a run if it doesn't have a roof on it. In Northeast Florida you also have foxes, coyotes, and bobcat. Dogs may be your biggest risk, they are mine. Raccoon, skunk, and even possum may be a bigger risk at night but they can hunt during daylight hours. I've even seen possum out in daylight, I did not expect that.
Some people can free range years without a predator attack. Some can get wiped out the first day they try it. You can read others' stories above.
My parents had two attacks, a fox and a dog, from the time I can remember until I left after high school. In three years of free ranging I lost two chickens, probably a fox. Then in a few months span I had two dog attacks from people abandoning dogs in the country. I lost 8 in one attack and 5 in the other. I really did not enjoy shooting those dogs, it was not their fault they were abandoned.
So I got electric netting to protect against land-based predators. It worked, no more losses to land-based predators. Over the years I've lost one fully grown hen to a hawk and one 2-month-old to an owl. That's all, others have lost a lot more.
I am curious as to whether I am just being over protective or should leave it as is.
That is totally your call. I don't know how many you have or how precious each one is to you. How upset would you be if one were killed?
I don't keep individual chickens, I keep a flock with replaceable parts. One of my goals is to raise them for meat, they are not pets. Losing two in three years was acceptable to me but losing 13 in two dog attacks was too much. Hopefully you will never see a dog, coyote, fox, or bobcat attack, or have a problem with an aerial predator. But if you free range the risk is there.