How long does it take to replace a blank...and set it to be the next bullet out.
Your hate for someone doesnt make them more guilty.
The armorer is not anyone else on set. Thats the sole reason they are there. To ensure the weapons are safe and secure.
Your specious statement can be said for every movie made with weapons, its irrelevant because it can happen anywhere. And the armorers would still be responsible if it did. Sheesh.