Many police officers don't really know all that much about guns, other than what they carry on duty. Certainly they know safety but to most the gun is like the hammer on a carpenters tool belt.
The armorer idea is perfect, just not some tattooed crossdresser want to be something else type.
The guns should be distributed directly from the armorer to the actor, no director or anybody else yelling cold gun and handing the gun to the actor. Sure it was bad practice for Baldwin to not double check but he's just an actor paid to do what they tell him and how to do it.
For sure there should be no target practice in the desert with prop/movie guns and no live ammo anywhere near where they are shooting the film.
The armorer on this set dropped the ball, the director or whoever grabbed the gun from the cart and yelled cold gun dropped the ball. He just grabbed apparently didn't check (probably didn't know how). Comedy of sad errors.
In Memory of Paul "Dietrich" Stines.
Dad: Say something nice to your cousin Shirley
Dietrich: For a fat girl you sure don't sweat much.
Cue sound of Head slap.
RIP Muggsy & TMan
"If you are a warrior legally authorized to carry a weapon and you step outside without that weapon, then you become a sheep, pretending that JOCKO will not come today."