No one is absolving responsibility from the armourer.
But if I'm the boss of a warehouse, never enforce any OSHA safety standards against my staff, and one of them just signed off that they inspected the forklift that day without actually doing so, and I drove the forklift and killed someone because of the forklift's malfunction, I am, as the boss, partly responsible for the incident.
To say otherwise is flying against rules and regulations written in blood, as we can clearly see.