Mark, you wrote, "The land I saw was so fecund that perhaps a really confident architect would do nothing other than find the natural greensites, mow them hard, find the natural fairways, mow them less severely, and find the natural teeing grounds and run a scythe over them. Not a spade, horse-plough or bulldozer in sight...."
That is part of the reason why I mentioned Parsinen. There were at least three different routings of courses to put on the land where Kingsbarns was built. Each of them could be done reasonably inexpensively and the finished product would have looked an end result of what you describe.
Yet when one sees the rolling hillside down to the sea, dunes that look as if they had been there since time began, and every hole feeling as if it had been taken from the water, maybe we've gotten to the point now where a grand engineering feet might be able to occasionally compete with mother nature in creating a field of play for a man-made game?