This desire is needed due to the extreme conditions the dogs are required to perform in. The dogs must work in mountain weather conditions. They must be at ease in cramped places such as helicopters, airplanes, boats, and even if jammed close to several other dogs. They must be tuned in to cues from their handlers, and still possess the ability to work on their own. As you can see, having an exceptional nose is not a prerequisite.
All dogs have good noses.
The lure of being a SAR dog handler is real, and the rewards far outweigh the headaches. Being on the front line of 10-15 missions a year can be exciting. For someone who really wants to help their fellow man, the endeavor allows for numerous opportunities to do so. Probably the biggest reward is the close working relationship a handler has with his dog. All ASD handlers share amazement at how we communicate with our canine partners.