I don't think people realize this because they aren't exposed to it. My sibling almost got bitten by our relative's dog because they got down in the dog's face

I don't think people realize this because they aren't exposed to it. My sibling almost got bitten by our relative's dog because they got down in the dog's face and went to pet him. The dog lived roaming in an orchard and now lives in a fenced in yard, but isn't used to new people, especially people invading its space. It seems especially common among a group of friends who have pets they dote upon like children to assume all dogs are friendly unless told otherwise. But that isn't true everywhere and they aren't all so socialized. The previous set of dogs would leave in the morning, run through the ditches, find other dogs, then come back later. Occasionally it was a concern, but often they were free to roam.