Actually this is another example of a rich person talking about how it's not about the money. You think weapons are intrinsically unethical, go and talk to the hundreds of millions of unarmed "ethnically cleansed" peoples in the 20th century.
Are they dangerous? Sure, no question. Ethically negative? A lot tougher call. All of those beloved government institutions are fundamentally built on there being a strong government, and when it is all boiled down, that fundamentally depends on having a government that can defend you against foreign incursion. If that is easy to forget, it is only because you are abundantly supplied with defense.