Years ago, about 28-30 well before there was even Internet, when the kids were babies and toddlers, we had Ajax, a GSD.
He was wonderful with the kids as they grew, absolutely loved them, was tolerant beyond belief. Things would happen... with the kids that might set some dogs teeth on edge. But he had incredible tolerance. As the toddlers got a little older and could play outside in our fenced yard, I'd keep checking on them, but didn't watch them constantly. It never occurred to me that there was a need to supervise kids and dogs constantly. Lots of people had kids with dogs and they all played outside together every day. Ajax would hang out with them and seemed very protective, not only of my kids, but their friends too. He'd follow them around, his tail swaying, play fetch, get belly rubs from the kids. Of course by this time, my kids really knew how to treat a dog and were very good with dogs.
Then we got our Lab, Bonnie.
Same thing...wonderful with kids. She would follow my then 10 or 12 year old son to his friends who had a wonderful kid dog and they'd go fishing or just hang out for hours. We had a big neighborhood of acreage parcels and private roads and at that time, the dog just went with my son. The boy and his dog.
It seemed a different time then. For eons loads of kids have had dogs that have trapsed around with them; fishing together, walking to friends houses, hanging out, playing ball, what have you.
I totally get it now...that there's a risk since you're dealing with an animal. I never let my kids be with the horses unsupervised. But dogs? To be perfectly honest, it never occurred to me back 15-20 years ago plus I had dogs that had the tolerance thresholds of the saints. If I had had snappy, intolerant dogs, that might have been a different story. But these dogs grew up with the kids from puppy hood. They were of the typical breed description, very much so....the shepherd sheperding and watching his flocks, the friendly, lumbering, laid back, tolerant family Lab.
I know now that animals are animals but that kind of style was the norm when I was younger. I too had a dog that went everywhere around the neighborhood with me when I was just around 9 or 10. In fact, that's the first dog I trained.
I think too, that with our life style these days and our culture, dogs don't get automatically socialized to such a degree that they did in the "olden days" where they wandered around all over, seeing all kinds of things, adults, children of various sizes, other animals etc. It was more risky in many ways and for obvious reasons that is not a good idea, especially now with such an increase in population....dogs and people. But boy, did they ever get socialized well.