In general people really underestimate how much training your eye is as much a skill as training your hands. It's like expecting the average person to send even a mediocre bug report; there's a lot of learning involved in knowing what details are relevant and what is a problem because of something else (ie the early comments about the eyes looking wrong were in many ways because of how the highlights were altered, but you wouldn't know that if you only looked at those very early comments because it took someone who knew what to look for to pinpoint what they were picking up).