Why was the Iditarod created?

No one can MAKE a sled dog run and pull a sled. Mushers must build relationships with the dogs. Dogs are born, breed, and trained to run. These dogs have it in their blood line to love to run and pull. The dogs also have a natural 2 layer coat to protect them from the elements. The dogs get the best veterinarian care possible. But no one can MAKE a sled dog pull a sled and race. The dog has to want to do it. (It's like you can't push a string...)