Have you ever sit on a chair that looks stylish only to discover it’s so uncomfortable you would rather sit on the floor? Or have you been impressed by the esthetics of a website to have then troubles navigating? Or enjoyed the sight of a building to read later how cumbersome it is for its inhabitants?
Those objects, buildings, apps fill our lives. For the sake of a better first impression, they sacrifice the function.
A good design takes something functional and improves its efficiency through a better form.
Enjoying design is a profoundly rational act. We do it through a mental process to understand the functional alterations. An (assumed) aesthetically pleasing chair that breaks your back is hideous. But a chair that gives you the perfect seating you were looking for is beautiful.