It’s a complex question, but I think the short answer is it depends on if your country has safeguards in place to control where that manufactured equipment goes. A few months ago I watched a video interview of a US State Department official who publicly resigned because he felt those safeguards (specifically laws of war and laws of proportionality) had been bypassed during recent arms transfer to Israel. I could see someone quitting their military manufacturing or engineering jobs for the same reasons. Whether or not you agree with how your nation’s arms are being used is a matter of personal ethics and involves things like political accountability.

I know I want my country to have self-defense capabilities, and that means having a well-supplied military. Thus I support at least some arms manufacturing. I very much dislike the idea of it being entangled with major economic factors because I don’t want war to make economic sense - i.e. “drive the industry”. My guess is a lot of people worldwide would like to see less arms-for-profit trading because it makes military industrialists rich at the expense of weapons spreading around the world and often causing harm to innocent people.