Imagine an human whose work is do lift rocks, one day he no longer can't lift rocks, they always fall from his hands how could he do it until dead? Use the rock

Imagine an human whose work is do lift rocks, one day he no longer can't lift rocks, they always fall from his hands how could he do it until dead? Use the rock to crush him? That would be suicide not actually "working until dead". What I'm saying is that dead is a slow process for most beings, not a sudden event, therefore "working till death" is a silly concept.