Well I'm not hundreds of years old, that's for sure.

My family raised chickens on what they could forage for themselves and whatever table scraps we gave them, no daytime predator protection, and no internet to ask these sorts of questions on.

For us, yes it was that simple, the hens raised their own chicks and it was survival of the fittest for whomever could escape the hawks and falcons.
Now as an adult living in the US and being responsible for my own chickens for the first time I realize things are different, that's why I'm asking all the dumb questions to understand the "why" of it. I don't have an attachment to the way things were done hundreds of years ago, but since that literally *is* my prior frame of reference I might mention it from time to time so that those informing me can get a sense of where the gaps in my knowledge might be.
I appreciate the response!