I think it is A LOT harder to choose a good site than most would think. I believe most of the times we hear "Well, they had a great piece of land to work with", it is said after the fact, with hindsight.
I don't know why this is (the difficulty of choosing good land, that is), just that it seems to be one of those talent things we can't really understand.
As an example, I'll cite Oakmont (of course). Superficially, the land does not seem that different from anywhere else in western PA. Yet there is unquestionably only one Oakmont in western PA.
Maybe that is making the case for the importance of how one uses the land, as opposed to how good it is to start.