Maybe, but I'd rather have an expert doing the check than the actor, and that's not a knock on actors. Given how ubiquitous guns are in film it strikes me as odd that there isn't always a designated safety expert to check these things. The task shouldn't be on the prop folk either. There's a lot of stress on everyone's shoulders during the production of a film, having one person personally check and load them and then during the blocking of a scene say "no, can't do it that way because it's pointed at someone, aim over there instead" should be standard. Again, I've not seen anywhere what the exact situation was in this case--whether it was during the execution of a scene or a genuinely boneheaded screwing around moment in-between--but I can totally see someone being careless with what they believe to be a "fake gun" unless someone's on hand to keep that shit in check.
Or, you know, filmmakers could wise the fuck up and stop using props that have the potential to kill someone. It's not as if there aren't alternatives.