Patrick,
While I hasten to start something with someone who refuses to be wrong in your own mind no matter the evidence against him, I will reluctantly go again.
Pat, do you think it takes 4 hours to execute your own personal shots in a foursome? No, of course, not. It probably takes, what, 30 minutes tops from start to finish of all 70+ shots per round. The other 3:30 is comprised basically of doing 2 things, waiting for others to hit, and walking the course. Why was this not obvious to you? Those two tasks and that large amount of time is a LOT of time available to look at all of the features in view on a course. While some courses such as NGLA have severe topography in places so as to not be able to picture different angles of play from one side of the hole to the other, it can be done in plain sight on most holes, especially by people with highly analytical minds.
Example 1: I can see from my bad angle in the left rough with a sloped lie, behind the fronting bunker, that the other side of the fairway, where it's flatter and the better angle provides an optimal line to an opening to the green, is the better play and is the strategy of the hole off the tee. Not terribly difficult to see while walking the hole and waiting for others to hit. And yes, I do and can see these things during play.
Example 2: I was away on the green, lagged up and tapped in to hole out. Holding the flag to replace it, now I have several minutes while the other 3 line up, mark, hole out, etc. to look around at the green complex and the next hole. Hmmm, I can see that hitting into that right bunker with the green running away from you is a no-no. And check out that chipping area back there.... Hmmm, the steep hill on two sides of this green looks very difficult to recover from so that I'd rather miss in that front bunker yielding an uphill lie.
It's not rocket science.
I will admit that your idea is optimal for best analysis, but it's very impractical and it's certainly not out of the question to get in most, if not all, of the features of the course by a single play.
I'm going to hazard a guess that perhaps 75% of all courses reviewed by magazine raters have been played (and only played) a single time.