A dog like that is most useful. It can serve as a reminder to some that perfection can be an objective kind of thing. Also, the light color of her coat can serve as an indicator of when it's time to sweep the floor. These are positive things. Conversely, Hollywood often uses a dog like this one to represent shame or unfairness. Not a positive representation by any means, but often times people end up making a bunch of money as a result, and that's good.
A dog like that is also very useful as a "filter" to sort out which people's kids should or should not be allowed into your house. Children of the hellion variety will usually either be disturbed by such a dog's condition and they will avoid it, or they will be encouraged by it's apparent weakness and will begin to mistreat it upon sight. Good, kind spirited children will also recognize the dog's condition, but will attempt to befriend the animal. As a bonus, your decision to not let some of your friends' kids into your home can now be blamed on the dog.
This is a very useful, good dog. You should consider insuring it.