[CydeWeys]

Accidents happen. You only have so much control over them. You also aren't the only person on the jobsite. You can be the most careful person in the world, and then die because your fumbling coworker a few stories up dropped a beam on your head.

A good parallel is motorcycles. A good motorcycle rider is much less likely to experience accidents than a bad rider, but even the best rider is still more likely to experience accidents than a car driver, simply because of all the other people on the road. You only have so much control. Likewise, even the best construction worker is still more likely to wear out their body or experience accidents than the average office worker.