I will wager he wasn’t.You have stupid citizens that also do stupid things, like enter a confined space without air monitors or a hazard watch, commonly known as a hole watch.
My neighbor got himself trapped sitting on his bulldozer in a trench collapse in the woods a few years ago. The only thing that saved him was the fact that he had one free arm and his cell phone was clipped to the visor.
I used to work alone at night in a sawmill doing various cleanup and maintenance tasks. If I had been incapacitated I could have easily frozen to death before anyone found me under a catwalk somewhere.
There are all kinds of dangerous positions we put ourselves in for work.