But that sword cuts both ways. Dog owners can be "dog centered" without regard to others. A little compromise/courtesy on both sides goes a long way.

Dogs should be well trained on a leash.
I particularly hate people with snowflake dogs, those owners that think their dogs are so special everybody should think they are special too. So, they let them come up to you without invitation, sniffing and worse jumping on you.
I hate it when people allow their dogs to come up to mine to sniff and play. My dogs are hopefully well trained, well at least the AKC says so as they placed companion dog titles in front of their names, and I absolutely don't want your dog coming over to sniff or play with mine while he is sitting or laying down quietly by my feet.
Your dog can be friendly in the dog park. It is not appropriate to allow a dog to invade a human's space or even another dog's space without permission. I really don't care how badly your dog wants to meet me or my dog, please ask first before approaching.
Conversly, parents need to teach their children good doggie manners. Just as a child can be frightened by a dog barreling up to them, a dog can be frightened by a child barreling up to them, squealing in delight wanting to pet the nice puppy. Unfortunately, even the gentlest of dogs can be unpredictable when frightened.
I will put my dogs away if a child comes over to play because my children's friendships are more important than my dog being loose in the house for a couple of hours.
However, if I am standing at the bus stop with my dog quietly by my side, I will not slink to the other side of the street if your child is terrified by just the mere sight of a large dog. I will never allow my dog to approach your child without your consent, but I will not leave nor put my dog away as long as the dog is completely under my control.
I have done my part to train and socialize my dogs. It is also the parent's job to make sure that children do not have unreasonable fears.