The only reason I can see from all the comments is cost. But it isn’t about a good reason. It’s about not micromanaging what people can do from a legal standpoint. Guns are either legal, or they aren’t. After that it would be up to unions involved in these things to demand better saftey for thier people. In this case we know the standards for safely handling guns on set were not followed. Now maybe that should be a crime and not just a civil matter. I could totally get behind that.