Earlier quoted context omitted.
It depends. If for some reason you're open carrying in a holster (like perhaps a police officer or soldier would be), and someone tries to get your weapon off of you and succeeds, a manual safety could save your life. They probably won't realize that the safety is on, and when they point the weapon at you and pull the trigger, nothing will happen, giving you a chance to escape or fight back. Without that manual safet…
I assume, based on your writing, that you have very little or perhaps no firearms training, particularly with duty carry and concealed carry. > and someone tries to get your weapon off of you and succeeds, a manual safety could save your life. This is something straight out of a movie...
I don't want to look up the sources here and now (work policies) but it does, on occasion, happen.