OK...but.... I’ll give you the ballistic shield. That should be on Baldwin as a producer. The live ammo should not have been present. I guess that’s on the armorer. That said, the industry uses blanks, and dummy rounds that look like live ammo. The armorer and assistant director clearing the weapon for the actor is to streamline the production process. Take Baldwin out of it. Suppose you were handing a gun to Andy Dick, or a child actor, or some bimbo that can barely work a doorknob. Should they be expected to know a dummy round from a blank from a live round?
It is OK if they can’t recognize a dummy round. All they need to know is there is a round in the chamber, and then go get the armorer and ask why that is and if it is explicitly OK. Wat you don’t do is just assume it is OK. Everybody on set should have been required to have basic firearms training as a condition of working around guns. Every single person.
I already said there should not have been any live ammo on the set.