“He could be losslessly replaced by a rock with the words “THERE ARE NO ROBBERS” on it.”
The security guard, the doctor, the futurist and the skeptic all say “nothing will happen,” and they’re right 99.9 percent of the time. Being right that often earns them a reputation and costs them nothing. The one time they’re wrong is the only time anyone needed them. A lot of expert jobs are a rock with a salary.