I argued that understanding perception is an essential part of any approach to cognitive science. I suggested that vision was one of the most important modes of perception, and that the attempt to make computer vision systems could shed light on many of the most difficult and fundamental human mental processes. Perception plays a primary role in the development of cognitive processes. Computer programs are written by programmers.
Shared experience is the basis of communication with others.
Understanding vision is a challenge. Writing a program to play chess is easy. A very large part of our brain is devoted to visual information processing. The visual capabilities of even the simplest animals are spectacularly impressive. Our own capabilities go far beyond the most advanced computer vision systems.