That's a good point. People on HN are sometimes a little quick to put on their "it's just a really cool piece of technology!" blinders and ignore the gruesome, wasteful military industrial complex that brought them these "badass fuckin' guns" which do, in fact, kill real humans in real life.
Nobody is really ignoring the reality of it. These are weapons of war. Not everyone reading HN shares the same outlook on the morality of war. I am personally an anti-war veteran, but that's a personal outlook that comes from some careful deliberation after observing how and why we wage war, and being fairly dissatisfied with both.
The beauty of technology is it's ability to overcome obstacles and act as solutions to a problem. I do not find that the morality of the problem can tarnish it.
Need to exterminate roaches quickly? Gas chamber your house. Save yourself from numerous diseases... I mean c'mon, you couldn't think of any legit use of poison gas technology?