No it is not that simple.
Movies, use of force and force on force classes.
All have safety prodigals that do not have the person using the gun. Checking it.
The safety personnel do not want a person screwing around with a weapon they have declared safe.
If you let the person using it screw with it. You are introducing another factor that you do not have control of as a safety person.
If the safety prodigals were not followed it is not the end users responsibility.
I understand your point about the stipulated Safety Officer being last to handle a weapon. If I was in Baldwin’s place I would have wanted to observe the weapon being prepared for an In-your-face rehearsal.
As I stated in my first response, a lot of folks don’t know the basics of handling firearms.
Movies, Hollywood, Washington D.C. aren’t special places with different basic handling protocols.
You treat every firearm as loaded, you never point a firearm at something you don’t intend to shoot.
Baldwin, as the end user had a responsibility to check the firearm. He is not absolved of this responsibility because he’s an actor.
It really is that simple.