There’s a huge difference between avoiding PPE because you’re macho, and the company avoiding structural reinforcements in a trench. This whole thread is sidetracked on PPE. When someone chooses to do angle grinding without a guard, or chooses not to wear a helmet or goggles, they’re putting their own safety in danger. It’s dumb, but very different from the company making that decision for you. Companies should perhaps be partly liable when they don’t require and monitor PPE use, but they should be
fully liable when the construction plan puts everyone at risk. That’s the company making bad/illegal safety choices for the workers, not the workers making their own bad decisions. Not installing trench boxes is like the company disallowing PPE on the job.
I’m sure there’s gray area in between personal bad decisions and company bad decisions, but if a mining company were to operate a mine without reinforcing the walls, a mine collapse is 100% on the company, whereas if workers stop wearing masks while working and they get black lung after being provided masks and being told they’re mandatory, then it’s a bit more reasonable to say the workers made bad personal decisions, and the company didn’t do enough to enforce personal safety practices.
Trench boxes are the same as mine cable reinforcement - something the company is fully responsible for. Pointing at workers and/or talking about PPE safety culture just isn’t very relevant.