One difference: if you're killed falling off a roof it's probably because you failed to take appropriate safety precautions; if you're killed by one of those ot

One difference: if you're killed falling off a roof it's probably because you failed to take appropriate safety precautions; if you're killed by one of those other things it's probably because it was out of your control. People are, understandably, happier to take risks where they feel in control of the outcome - which is why so many of them fall off roofs.