Why are passengers going through security hell to fly? For show. Nothing more. And, 99.99% of the passengers accept that show as reality and FEEL safer when the truth is they are not much safer than they were the day the first magnetometers went up.
The airline security scam went into place decades ago to stop hijackers from taking the airplanes to Cuba. It probably did a poor job, but the screeners did catch a firearm here and there. (I don't know if they ever caught a firearm on someone who was later shown to have malicious intent, i.e. to hijack.) But these were measures meant to stop a person who wanted to live through the crime.
With terrorists willing to kill themselves in the process, airlines will NEVER be totally secure. NEVER. It's not possible. But passengers are all too willing to spend their tax dollars and give up privacy and dignity to let the government PRETEND to keep them safe. They are all simply fooling themselves. It doesn't matter what the government does, suicidal terrorists will eventually get some plot completed. If a terrorist even makes it to the airport, then the government intelligence community has failed. The money being wasted on high tech scanning equipment would be better spent on building up the intelligence gathering and investigation arms so that terrorists would be detected BEFORE they even left for the airport. But, passengers want the to see the show, so the money gets wasted.
And, think about this the next time you are in one of those Disneyland-type serpentine security lines with about 200 or 300 other passengers waiting for the X-rays and gropes: If there is a suicidal terrorist on line with you, and he does indeed get caught at the checkpoint, what's to stop him from detonating his device right there and taking out the entire entrance lobby, the hundreds of passengers and the security staff? Do you think a nut-case terrorist is just going to give up and meekly head for jail when he is literally "all charged up" with a colon full of C4 plastic explosive?
And, in the aftermath of such a hideous crime....then what? More screeners? More pat downs? Better x-ray machines? What earthly good would it do?