I guess I have a hard time with this part of the premise:
1) the site and layout for the golf hole was so compelling that virtually any architect would have included it in the course routing
In my experience of looking at sites that other architects have looked at previously, I rarely see much overlap; for example, none of the holes I routed at Sebonack were similar to what Jack Nicklaus' office had routed before. [I try not to look at any previous plan before I've studied the topos without it; I didn't see the Nicklaus routings until months after I'd done mine.]
It's just not as clear-cut as you think; once you put even a couple of holes down on paper, you start thinking in a certain direction, say clockwise or counter-clockwise, and you're liable to miss even "obvious" holes that another architect saw because he was looking at it differently.
i did notice that David Kidd had a couple of holes on his routing at Sand Valley that are very similar to holes I'd routed at for that part of the ground. [I did two routings there for different parts of the site; Mr. Keiser only looked at the other one.] Those holes were in areas where you had to make transitions over a steep ridge, and we both found the same way over. But, because David's clubhouse is in a different location than mine, he wasn't headed the same way once he got over, so the rest of the plans were totally different.
Golf holes only seem obvious once you've found them.