Matt:
That's precisely the part I don't understand.
If I play the course, I am judging how it plays for me. I've got to interpolate what it would play like for everybody else, and I do believe that's an important part of the equation ... that I am not just supposed to vote on what a course plays like for me.
So if a lot of what I'm judging is NOT the immediacy of my own play, then what difference does it make whether I'm playing or not? Even if, say, I judged incorrectly and my own 4-iron held a green more easily than I thought, there are still a lot of players for whom it would not hold; there are days when the shot would play downwind and it might not hold; etc.
You seem to imply that I am judging mostly the esthetics of a course when I'm walking around, instead of the shot values as well. I can assure you that's not the case. I have to judge shot values all the time in the dirt ... so I don't think it's too much of a stretch to believe I can judge them when looking at a course in playing shape, even if I don't have a club in my hand.