Kyle,
That landscape might not be mowable at green height even in it's present scale, but I still understand what you're saying.
I don't think often in terms of fairness. I think almost everything is fair, so long as to be able to keep the ball in play and the hole is able to be completed.
Using that landscape as a large scale example of what you're talking about, I like the idea. It provides possible hidden doors, if you will, to get where you're going without it being an obvious direct route. It kind of combines the idea of hidden routes (think old school Super Mario Brothers) with the the entire landscape before your eyes. The secrets to getting where your going is only limited by your imagination.
Joe