They know it's just part of the system, and the routine.
These folks have a slightly different mindset, and, I think, view procedures as important to weed out people who might cut corners, lean into their ego (how dare they make ME take a polygraph), or be careless with information. A nice side effect of this process is it selects for humility, openness, and conscientiousness.
And they view the work they do as hugely important for the security of their nation. Including those who laugh at them for their chosen profession.
They were some of the most professional, conscientious, diligent, and excellent technologists I've ever worked with. Definitely on par with anyone at FAANGs or startups that I've work in.