Pat,
"It's very difficult to provide an enjoyable challenge to every level of golfer, and when an architect attempts same, he HAS to make concessions that diminish the product."
What sort of concessions? I don't think there are any carved in stone. It is hard to do but not impossible and I wouldn't think concessions have to be made except for practical reasons.
"I don't think you can craft a design the presents an interesting challenge to every level of player.
I think their has to be a target specific golfer, and, in my mind, that's the scratch handicap amateur."
I disagree. It isn't easy, but it has been done and can be done. In fact, it is harder to do today because the spread between a tour pro and an average player is greater today than it has been.
Has any architect gone through the far more numerous permutations to place multiple tees in locations relative to natural and man-made features that would make a course an interesting challenge for all classes of players? Probably not--it is a much longer process and most golfers wouldn't even realize the inherent genius and benefits of a design...maybe for the reasons you cite, on infrequent visits, you're likely to play from the wrong tees but more likely because they don't think about it much. They want it fair and pretty.
"I think the answer is obvious.
Because many who go to play there want to play the golf course from where the U.S. Open is played, and not the regular or short tees."
Nearly every course in America is impossibly harder for the average player from the tips than the member or middle tees. So Shinnecock is no different though more people are likely to play beyond their means because, as you say, it is a US Open course. The fact that too many people play Red Badge of Courage golf doesn't mean that a course cannot be challenging to all classes of players. The players don't play from positions that demonstrate the architectural intent.
Flynn was an early proponent of multiple tees played at the same time for different classes of players. He noted that players often did not play from the correct tees. He suggested a sign be posted,
"GOLFERS, ATTENTION!
In order to accommodate all classes of players your club has gone to the expense of building forward, intermediate and back tees on many holes. These tees are kept in order and markers are placed on each one. Except in tournaments please use the tee that fits your particular game and enjoy the course."
Of course, people being people, they do not follow good advice.
Given the abilities of today's touring pros, there really isn't anything that they cannot score low on. That would be the ultimate, and maybe unreachable, goal of an architect though not feasible on all ground for golf. I fail to see how this is a factor in the design element, though as you point out, it is a factor in the practical decision making and that was a correct response to how Shinnecock got its reputation. My point is that architecturally, it is unfounded.
I didn't say it was easy to design and that there are numerous examples where a design can offer enjoyable difficulty to all classes of players. But they do exist and I'm sure I could name more than 5 but probably significantly less than 50. That may be more an artifact of design mandate than due to owner/member directions and ground constraints.
I bet if Tom Doak were given the opportunity to do so and had the right ground for it, he would accomplish it and it would be recognized as an outstanding accomplishment. Heck, his 6800 yard courses come close to doing so.
"While I love NGLA, Pros might find it unchallenging under normal playing conditions."
They certainly would, and they would at Pine Valley, Merion and many others places as well but not to the extent of NGLA because of the length. In relation to par, they would humble the course. Par should be altered at NGLA...or at least have 2 sets of scorecards as Tom Paul proposed. Scoring would be low, but less so relative to par. If par is defined as the likely score of a scratch golfer, the par is too high at NGLA; yet traditions linger.
"I think Aronimink (sp) from the back tees is too hard.
I would not want to play it every day.
Same for BPB."
They are too hard for mere mortals. Those tees were built for golfers beyond your ability and way beyond my own. I may be long enough, but I sure am not straight enough. As an aside, given Aronimink's greens, I would say that the back tees at Aronimink are even harder than BPB. Not as interesting tee to green though.