No. We are saying that there are many mapping packages in common use. Many of those can accept other formats. Often those programs allow one to select which format to use. I use TOPO! and Google Earth form my personal stuff, and set both of those to degrees and Decimal minutes.
Transmitting, typing, email, and pasting all work with other formats. It just depends on what format your local dispatch or SAR folks prefer.

A friend of mine who moved to Alaska from Colorado said that down there UTM is the prefered format for SAR. But around here, a UTM zone boundary runs right through Anchorage. Using UTM becomes more complicated when you have to deal with a zone boundary. Also, here in Alaska, SAR often involves use of aircraft, either for searching, or transporting SAR teams. Hence degrees and decimal minutes has become the default for GPS.

As I get to be a geezer, my SAR role is tending more to training and as part of the SAR management team. I always try to teach folks to be conversent with all the common location formats (degrees & decimal minutes, decimal degrees, UTM, etc), so that they can switch if need be. I also recommend that people always try to give both gps coordinates and location relative to landmarks ("my location is N 61 deg 6.349 min, W 149 deg 38.198 min, on the west ridge of O'Malley peak at about 3250 ft elevation"). This allows for an easy cross check of their location.