[1] The study of history is, to a first approximation, the study of war. I am not conceited enough to believe that my generation is the first one that is living outside of history.
We need a strong military - we just need to stop going to war at the drop of a hat.
I could just stop making tools.
I don't think I'm okay with making wars a clean, professional thing. It should be brutal and bloody and messy at every stage, so we can't isolate ourselves from what we're doing.
If you're making weapon systems and going "Well, I'm not responsible, I just helped make a technology" and the guy firing them is saying "Well, I'm just following orders and pressing some buttons, I'm not really killing them" and the guy in charge is saying "I'm just implementing what the politicians/people want" (depending on how high up the command), who exactly is left actually carrying the price of it?
No, I think I should do everything I can to make sure that we are forced to viscerally feel the terribleness of war when we decide to wage it - not pretend it's a video game.
If you believe that carnality would put a stop to warfare, I think the last couple thousand years of it might disagree with you.
Granted, the sight of carnage can turn the tide of public opinion against a war... that's been the case since World War 1 put an end to the idea of war as a noble game where boys became men. But it's not going to stop wars from being waged, just make the politics of managing them more difficult, and make it more torturous for the soldiers doing the killing. The generals probably aren't going to lose a night of sleep even if people have to hack away at each other with machetes.
My goal it's to End All Wars Forever! (TM), it's to raise the cost of waging wars for a society, so it's something we do less casually.
These days, I'm fortunate enough to work on training sims for demining. I'd have to recommend that if you are really concerned about being a potential party to killing, don't worry about it - until you vote. Or maybe even write a letter or do some activism. But the last thing you should do is cripple the tools you make for others to use in some sort of ignoble bid to be moral. That's not moral, it's unprofessional.