I carry a EPLB with a GPS function - but only when I am scuba diving from a boat in areas with strong oceaninc currents. If there are no strong currents then I do not carry the beacon.
The chance of getting swept away from the boat is not high, but the chance is present. At least on dry land you can call someone on a satellite phone and tell them where you are; but out a sea, when you are drifting with the currents,you need a beacon with a GPS locator function.
I do not carry my EPLB at any other times.