Not to say overwork didn't lead to her death, but you're conflating two parts of this story - Zion (who died) wasn't the overworked medical worker, the workers

Not to say overwork didn't lead to her death, but you're conflating two parts of this story - Zion (who died) wasn't the overworked medical worker, the workers being overworked led them to make poor decisions that led to her developing serotonin syndrome