Logitech asked Cooper to design software for its new Peacock scanners. The purpose of such software is to help users edit and manipulate digitized images. But Logitech worried that poor design caused users to spend more time on reconfiguring controls than on editing images. You don't have to be 'automobile-literate' to get along in this world. And as computing power weaves its way into every aspect of life, poor design threatens to make everything harder to use.
Computer chips are in everything.
I have a digital camera that behaves like a computer. Computers are becoming an integral part of daily life. And if people don't start designing them to be more user-friendly, then an even larger part of the population is going to be left out of even more stuff. Each category of users has a distinct need. But the Varian MRI's existing interface was designed to serve all three categories at the same time.