The USGA's fixation of scoring -- keeping players at or near par -- results in courses being created that sabotage creative shotmaking. You simply get robot-like result oriented players (see the likes of Scott Simpson as a good example) or worse yet a player like Andy North who won two US Opens.
I like to see players tempted to use drivers whenever possible. If set-ups are made to go the totally "defensive" route then you have the plodding style of golf that becomes a real bore.
Matt, you've got two causes to the effect--boring golf--identified here. One is the USGA's fixation on "protecting par,"" the other is "the setup." To me, the latter is the problem the USGA should rectify--high rough, narrow fairways are utterly monotonous ways to "protect par" and as in the examples you point out, do not seem to readily identify the best players in the world, but the guys who can hit it straightest.
John VB's comment about the Mike Davis philosophy is intriguing--if a hole is highly probable to be approached in two shots, it ought to be a par 4. I like that idea. However, the comments about "getting into golfer's heads" are concerning. Are the best players in the world really that stupid? Won't the successful players play these tweener holes as 1/2 par holes, and choose to "go for it" if their tee shots enable them to, and play safe or for an up-n-down if not?
Sodden thought: if the USGA is able to willfully change the strategy of elite players simply by changing the par on the scorecard, then all those who criticize golfers as idiots playing a meaningless stick and ball game are correct, and all of the architects who labor long over the design of a strategic golf hole are wasting their time...