The purpose of the entire enterprise is killing people. I never sell anything, but that doesn't mean my job isn't making the company money, by way of making the stuff that the company sells.

That's not even necessarily a bad thing. WWII? Solid war, the Nazi's needed killing. And I like having people willing to do that on my behalf, so that I don't have to. But pretending the military is some lollipop guild that goes around spreading happiness and cheer is extremely disingenuous.