This is one of the biggest issues in golf architecture. It has been since the Golden Age. How big is it? No other issue has spawned more bad golf designs. (Second place is awarded to Fazio's and Rees's thing with "framing", a topic that has already come up a couple of times at GCA.
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There seem to me to be three reasons why people care about low tournament winning scores.
The first is a juvenile (think boys at junior high recess) mentality that says you can't come in here and beat up my golf course. I have nothing interesting to say about that attitude. It's embarrassing; grown men shouldn't care about stuff like that.
World class players, when playing at the top of their games with the best modern technology, will (and probably should) overwhelm even the best courses. If they aren't beating up a course when playing well, I (along with Mack, Jones, Behr, Thomas and others) think there is probably something wrong with the design of the course.
The second reason given is the Joe Dey reason. Only really tough courses that yield winning scores at or around par identify the best players.
The Dey hypotheis has a certain surface appeal. The problem is that there is no evidence that it is true. The dominant players of an era dominant tournaments played on hard courses, middling courses and easy courses. There is no evidence I've ever seen to indicate that dominant players in an era dominate more often on hard courses than on easy courses. They dominate on both.
The third reason given is that people don't enjoy watching birdie fests. Well, I do. I suspect others do too. TV audience levels do not vary with the number of shots the winner is under par. People want to see great golfers playing great golf. More importantly, consider the alternative: a US Open type course where shots are dictated, where the greatest players are discouraged from taking the risks that display the full range of their talents and the biggest thrill is whether or not players can save par.
Great courses need to be interesting and challenging. But great players can and will dominate great courses. Courses where great players never go low, where par is a triumph, is a sign that something is terribly wrong architecturally.
Bob