I wonder what it feels like to know that your job is 100% completely useless, especially for police/security people who probably had some notion, at some point,

I wonder what it feels like to know that your job is 100% completely useless, especially for police/security people who probably had some notion, at some point, of protecting people. Do you get depressed? Fatalistic? Just say "eh, it's a living"? Or do you construct elaborate justifications for why stopping people crossing the street after 5pm actually matters? I suspect it's the latter, given that someone was apparently imprisoned for a month for the crime of going to the gas station after hours. Someone with a badge and a gun actually, consciously decided that that was vital to the security of the United States. That's depressing in itself.