Nobody forced him to make this movie.
You shouldn’t play with things you don’t understand.
he isn’t ignorant, thats just it
he’s been around blank firing prop guns for decades, ever since the hunt for red october in 1990
they spend time educating actors using these about proper handling and safety procedures brcause they can injure - or worse - others if they aren’t used correctly and safely
and he’s been on plenty of movie sets before where he’s used them and got training about them repeatedly
Would be interesting to find out that it came from his private gun collection...associated with cowboys.
"Something" in his mind made him write this cowboy movie, "RUST"...which is about an accidental murder.
And he's a big anti-gun person.
He's been in enough movies to know "gun rules".