Tom's last line (above) seems key to me.
I've long thought that the most boring, middle of the pack check-cashing plodder on the PGA Tour knows & understands more about golf course architecture than most of us here ever will -- but it's a kind of 'knowing' that is so 'real', so much on the level of actual engagement with the golf course specifically in terms of their own games and so much part of the thinking they have to do every single day, that the pros don't often verbalize their thoughts or talk about architecture as a concept/idea separate and apart from the playing of the game itself.
But that doesn't mean that they could turn around and find a viable routing or design a golf course or build a golf hole -- no more than the ability to type necessarily makes one a writer. The execution, on the ground, is what it's all about, and tour pros (even with their greater understanding of what gca) are no more likely than you and I to have the skills to create & execute in that tangible way. In fact, they may in some cases be less likely than us, but only because we at least have more humility in recognizing our limitations than they do.
P