Just like Horace & Daniel's said LAWYERS. God forbid one ever have to use his or her gun to defend themselves and cause the demise of a bad person(s), he defense lawyers would love to have that extra argument point that his or her client even made a conscious decision to purchase a gun with extra safety features (THUMB SAFETY) on it. Establishing that the shooter was not some gun nut prowling around the neighborhood looking for a quick draw gun fight. I dont know how that is GUN DUMB as one of our resident Einstein here suggest.