I am not an engineer or landscape expert.
But PGA National is in Florida - where the ground is flat and the water table lies just a few feet below ground.
So, while I think your query has merit for sure, it also needs to be placed in context with its specific environment (literally).
In this case, and in the case of (WAG) 80%+ of all (southern) FL courses I have played, a course's mounding and its green elevations are built with adjacent dirt that is excavated on-site. In place of the dirt then lies a man-made pond that is integrated into the fairway, green and overall course strategy as a water hazard. Necessity over
So perhaps the local envirnmental realties dictate an architect's placement and integration of water as a hazard.
If H2O was really such a valued architectural feature, then why hasn't it been used in the UK and Europe in larger amounts?
It may also help define some architects who do, in fact?, use water as a crutch. Doesn't some US golf get criticized by others for being too penal? What is more penal than water - besides OB - as it completely eliminates recovery as an option.
Also, I don't know to what extent the presence of residential real estate, or the flow of water for irrigation, plays a role in the topic, Pat.
To me, you play in FL, you need to be ready to take a bit more club and get the water out of play.
Just like in the desert with large waste areas.
Just like in Scotland with heather and gorse.
Just like on many "new restorations" with large areas of tall grass. (I hear Chicago Golf Club is taking out much of the tall fescue put in before the Walker Cup. Rumor, of course.)
Florida has water everywhere and, no, I would NOT want to play there everyday...;-)