Yes, that is something different. You are right. Even firing pin safeties are not infallible. About 6 months ago a police officer in Austria shot himself in the foot with a Glock. He forgot to remove his trigger finger before holstering, and it was enough force to fire the weapon.
I own a 39-2 and it does indeed have a firing pin safety. The safety bar hold the firing pin and on "safe" the firing pin is at 90° to the cartridge. In my eyes this in completely safe unless you take a largish hammer to the firing hammer.