Jason,
Are you really comparing revetted bunkers to those at Valhalla?
I really don't want to get into a wise crack contest with you. My point is the maintenance of bunkers has surpassed, or maybe better said, become incongruous with their use in golf architecture as a hazard.
For years we have heard "get in the bunker" from players but it seems to have reached a new level. And, since bunkers are the most expensive feature to maintain or build next to greens. Maybe we've reached a time where they have out lived their usefulness, especially on a clay site where they are totally manufactured.
At Valhalla it seems to me that it would have been just as good to have little perfectly manicured pieces of fwy turf in place of the perfectly manicured and smooth broom finish of the bunkers.
If we are going to reward a miss, why go to the trouble and expense of building such artificial "hazards" when they are actually the preferred area to moss.