Compelling argument? No. I just personally don't see a need for one. I carry a P229 and occasionally a P3AT. Both guns' DA trigger pull is long enough that there's no way I am accidentally going to fire them. I don't even think I could "Pull a Plaxico" with them. Adding an external safety to me seems to be overkill if you have a DA gun and have safe handling and carrying practices. If you carry in a holster with the tirgger covered, don't play with the gun while you are carrying, and keep your finger out of the guard when you draw, I just can't see the need. Plus, it's good to know that if my wife, who doesn't shoot, needs to use the gun, all she has to know is aim and fire because I am sure she would not remember to disengage the safety.