Fear and safety go well together. It's the fear of an incident that makes you double/ triple check things, and not take short cuts on maintenance etc. Or fear of a random check by the regulators
Now, maybe we should all be mature professionals that do this anyway - but a back up of punishment based regulation is needed. To use an analogy, we all agree drink driving is wrong/ dangerous etc. - but the fear of a breath test/ loss of driving licence certainly helps reinforce the safety...