Perhaps, but as the example in the story and Comms' story illustrate, you may not even be planning on being out in the backcountry when your GPS sends you someplace dangerous, so you may not even think of having your PLB with you.

For example, many thousands of people make the drive from Southern California to someplace like Las Vegas each year. From your air conditioned home, in your air conditioned car, to the air conditioned casino. There's little chance of getting lost if you stay on the interstates, but get off the beaten track a bit on the way and your GPS blurts out, "Re-calculating..."--who knows what goat path you may end up on if they're in your GPS' database?