Jack, the problem is in the design philosophy that allows the selector to be placed on the trigger, inside the trigger guard. Certain hazards can be eliminated with good design. The landing gear switch, for example, probably should not also function in a different mode to become the landing light switch lest someone retract the wheels on the ground whilst intending to turn on the lights.
Do we have a lot of people shooting unintended things while attempting to select which barrel will fire first? No... but everytime I use a gun so designed, and I have THREE of them, I always marvel at the thought process that figured this was a great place to put the barrel selector.
Reference NRA safety rule #2. "Never touch the trigger until ready to shoot."
