Is tail docking harmful for dogs?

I know farmers would dock tails of working dogs because their tails got in the way, and they would often get injuries from their tails being stepped on by cows or horses and could get seriously infected. I get that. But don’t dogs use their tails for balance? I suppose it would be like if a human lost an arm or an... show more I know farmers would dock tails of working dogs because their tails got in the way, and they would often get injuries from their tails being stepped on by cows or horses and could get seriously infected. I get that. But don’t dogs use their tails for balance? I suppose it would be like if a human lost an arm or an ear that would impair their balance. Years later it doesn’t hurt anymore, but it still hinders certain abilities. I know it’s just simply the traditional style of certain breeds, but if the dog isn't being used as a working dog, it seems like a strange and unnecessary thing to dock their tails.
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