Why is so many people on here rude to anybody that breeds their dog and calls up back yard breeders?

I would rather get a puppy from someone who raises the dog not just for puppies. I love my dog and yes she has had puppies that I sold 4 differents times and now she will not be having anymore I will not breed my dog to death like some people do. So do these people think getting a puppy for a pet store or a puppy mil is good. My puppies were always loved and already good with kids before they were sold. Not locked in a cage and unfriendly. So don't call people backyard breeder if you don't know anything about them. So where do you think we should get puppies. And what makes someone a backyard breeder a very rude term by the way.