The reason they're doing it is because it's national security and espionage. It's objectively better to deny 1,000 solid applicants because of something on a po

The reason they're doing it is because it's national security and espionage. It's objectively better to deny 1,000 solid applicants because of something on a polygraph doesn't look right than to allow in one foreign agent, at least that's the idea. So they add this filter, it will filter out some good people but maybe it'll filter out a bad one or two. That one or two makes it worth it in their eyes. It has nothing to do with "maintaining the shroud of 'this works'" because it does work for the purpose they have. It doesn't need to be 100% accurate or admissible in court.