Geee, if I read you correctly you are being facetious.
That is not their purpose, to portect your sorry a** from killing a line worker. Power can feed in any direction and if there is power on both sides of the switch it will make as nice BOOM when closed.
Also who knows when or where a careless homeowner will connect one of their "easy" generastor hookups. The linemen could be just connecting wires of fuses when a backfeed comes along.
It CAN and HAS happened!
Good luck with your theory. 'Cause it don't hold water!