The atmosphere at the airport is as free-and-easy as in a public park. The official assumption is that the people around you pose no threat; from the moment you walk through the front doors of the airport until the moment you step onto the plane, not a soul will stop you or ask you a question.Would you feel safe? Would you want to live in such a country?You did, if you were a citizen of the United States before the 1970s.
He's right that the people who are working the jobs are bewildered. They probably believe in what they are doing. But their belief doesn't change the invasive nature of what they do, and it certainly doesn't eliminate the possibility that some lunatic can think of another way of commandeering a plane that doesn't require any metallic object.