I have a friend who works for planning and development. He wears a suit and wingtips not jeans and and boots. But on a job site, he always dons a hard hat. In his office he has an old, steel version of the hard hat with a huge dent in it and a bolt sitting next to it. That bolt fell from high above and the hard hat allowed him to be able to drive home from work rather than be carried away by an ambulance.
This guy in the video would surely have been severely injured if he had not been wearing the hard hat.