When the golf hole is routed upon land that presents alternative strategy, variable wind conditions, shot making talent, and resistence to scoring from tee to green, all based upon the laying upon that land of that golf hole, who the heck needs bunkers?
Ideal Golf design, first and formost requires excellent ground contour. Frequency of rolls in the ground, and good turf growing soils can provide a golf designer with the opportunity to present a challenge that uses "every club in the bag", even the sand wedge, where no sand bunker is actually present, IMHO.
I'd rather play an interesting golf hole with ground contouring and directional/distance variables, with an interesting green at the end, than a one dimensional, bunker strewn, eye candy riddled corridor.