I never said it went off while "untouched" ... go back and read it again. If it goes off while inside a holster while the holster is being removed from your body and with a finger was never on the trigger, then something is seriously wrong. Fact is, no gun should go off unless the trigger is pulled.
Of course it shouldn't but anything that bumps, wiggles, jars or touches the trigger COULD set it off.
Squeezing/ grabbing a soft holster just the right way could do it.
If the gun has such a tendency to go off unprovoked how come they dont do it at the range between reloads and firing?