“The products we design are going to be ridden in, sat upon, looked at, talked into, activated, operated, or in some way used by people individually or en masse.
If the point of contact between the product and the people becomes a point of friction, then the industrial designer has failed.
If, on the other hand, people are made safer, more comfortable, more eager to purchase, more efficient—or just plain happier—the industrial designer has succeeded.” – Henry Dreyfuss, American Industrial Designer
Emphasis are mine. Something about the idea of friction is sticking with me. Also, I like this as an effect of a design: “or just plain happier”.
No, we don’t always have to merely be more productive or efficient. Happiness is a legitimate goal on its own.