I have to agree with Ed's comments above.
The idea that electricity is always trying to seek a path back to the earth is a myth which seems to be widely accepted as "fact."
Maybe the producers of these sorts of shows think that it would be too complicated to explain that it is seeking a complete path in order to return to its source?
The whole concept of grounding, and referencing voltages to ground seems to be an area which is widely misunderstood.
