Much like the CAPS system in Cirrus aircraft this is a tool to be used in exceptional circumstances. Probably better than a passenger with no experience of handling a GA aircraft or radio-telephony sticking it into a smoking hole in the ground.
If I was a controller at a busy airport with a GA aircraft with an incapacitated pilot in the zone, I would much rather that an auto-pilot was flying a published arrival to the airfield and making radio calls, even if those calls were blind. That way the aircraft is flying in a stable and known approach and everyone else can be vectored out of the way!