The power of our visual sense attests to its biological importance. Evolution has allocated nearly half of the primate brain to the processing of visual information, so that we are able to manipulate, control, and survive within our physical world. It is therefore not surprising that the evolution of information technologies is confirming this commitment.
Vision is one of the primary substrates for mediating interaction with the physical world.
Imagine, for example, trying to walk around your house completely blindfolded. This is essentially the task a sensory-deprived robot would face trying to assemble an automobile. An index to every single component in the robot's world would be required, as would the recipe for using them. Such perfection is clearly impossible, as is walking around one's house without sensory information. Feedback mechanisms are necessary to control uncertainty.