> You might make less money, but you'll almost certainly sleep easier

Idk, there's something unethical in outsourcing ethical grey areas to other people while reaping the benefits of the peace (or war far from your home) it brings.

There is also the simple fact that predatory monsters exist. A wealthy society that demilitarizes learns the lesson Europe is now. (If Ukraine didn't have a domestic defence industry, it wouldn't have been able to fight the fight it has been able to.) Put another way, you'll sleep easier, but it's a false security, even if it's one that may last for the rest of your own life.

I'd also note that you can absolutely contribute to parts of the military where you actions are highly unlikely to directly result in anyone dying. Air-defence radars and munitions, for example, particulalry those designed to take out missiles and ballistics.

You're not responding to their actual comment, you're arguing something else.

As for "someone else will do it if i don't".... (aka your argument). That's true of a lot of things, and I sleep great at night choosing not to steal from people even though I know others will choose to steal. It turns out I don't have the ability to choose their actions for them, only my own.