The nearly inscrutable semantics of "nature" and "natural" are bogging this thread down...
...that, and PM is magnet for contention when the question is one of pure opinion, without discrete data at the bottom.
I figure that, to the extent that we're all talking about the same thing when we say "nature" - I agree with PM on two counts of the topic question
1. I think it's "natural" in that it is "natural" for golf; this is the whole damn point that's readily missed in the many discussions of MAC/Raynor/Banks work, Template holes, and "engineered style." It's how each element of the design, each hole, tends to elicit the SHOT VALUE the early modeling architects found worthy from the GB/Euro courses to which they were exposed...
Biarritz - SHOT VALUE - a long, lower, centered hit where proper judgement of carry and overspin release are rewarded...
Redan - SHOT VALUE - a risk/reward of executing distance and shape ratio where the shorter and safer the player goes, the more that the fortune of the front contours work can thwart him and the longer and deeper into the green he goes, the more precious becomes his evaluation and execution of distance, as the green is oblique and thinner.
Short - SHOT VALUE - precision of distance control with a shorter club in your hand. The risk is the moguls, pimples and/or pockets of the traditional "Short" putting surface, which can range from "Dolomites" style..."bathtub style" to just about anything devious The designer gave you an 8, 9 or PW in the hand, if you come to rest 40 feet away on a Short, you're supposed to have issues
and on and on...each of the Templates is replicating the shot value of its model, or in the case of some CBM/Raynor originals... discovering a shot value that's worthy of presentation.
Of course the whole damn sport is artificial, as is all game-recreation, and all architecture is artificial because it was made by man, not by nature and in the case of golf, the use of what the sea revealed, the bird shit seeded, the sheep huddled and the rabbits' warrened is...all non-natural and artifical. We made that use; it didn't occur in nature.
so, the first part of agreement that ngla is more natural than it appears from watchign it on TV is because the shot values - the natural elements/measures of competence for a game of golf as we understand it - are very harmonious, they are not wrought from the terrain, they feel justly placed for what a golfer is trying to do there.
2. To me, while the pins are in, the greens are mowed, the fairways clipped and the bunkers edged, the course cannot be "Indistinguishable from nature" However, I offer the speculation that if the NGLA were untended and allowed to grow wild for one season, when you returned, it would appear like any protected bay-side preserve...long grasses, exposed sand, bluffs and scrubby meadows, sea and brush birds twirting, small game tickling about. To that extent, it seems very natural to me.
MORE:
Now, on a comparative basis, I'd have to say that neighbor Shinnecock seems more "natural" to me and perhaps comparisons of such courses on a point by point basis elicits what the properties of "nature" and "natural" should be called/defined.
cheers
vk