How ever you feel about raw, dogs are not omnivores. Everything about their mouth and digestive tract says carnivore, and that is how they are classified.
Do you base your whole opinion of the raw diet on your vet's one experience with one dog? You didn't give any details, but any number of things could have gone wrong. If he went into this without knowing what he was doing, he might have made some errors that accumulated over 6 years. Don't assume a vet knows what they are doing. Remember, most of them recommend Science Diet or Royal Canine. Or maybe, as GeeRome said, his dog was one of those rare exceptions.
There are many vets in my area that encourage raw diets for dogs and cats. There are obviously whole websites for the purpose of gathering together countless raw feeders, and many, many dogs of all ages out there thriving on it. All these success stories, against your vet's one failure? Don't you think the failures are going to have the biggest mouths? (As is usually the case). So where are they all? When is it reasonable to take a stand AGAINST such odds?
I'm not saying everyone should feed raw--I don't, yet--but to say that dogs are omnivores and that raw is inherently dangerous for all but a tiny minority of them is just uninformed.
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I've got one of those, too! Romeo has learned now to use his paws, but he still stays pretty clean. Gio, on the other hand, digs right in. Raw goobers all the way up his leg feathers!