John,
Whether it's romanticized in print or not, there's a reason we've read about Bill Coore looking for animal trails when routing a golf course. It just makes sense. Animals instinctually follow the path of least resistance and most safety.
I think the fluidity of naturalness should be the driving force behind how a course moves. That one idea--in and of itself--should be reason enough to try and minimize friction.
So, no, I don't think it's arbitrary.
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BTW, Don Mahaffey is helping me develop a way of turning this idea of friction, gravitational flow, and interaction with mother nature into my masters thesis. Somehow we're trying to translate the relationship between disturbing mother nature, and how well a course drains and grows a sustainable playing surface.