If the country wage wars for bad reasons, that is another problem that probably should be fixed elsewhere, or you should leave that country and be somewhere who government you can fully get behind.

> defending your country

I am afraid that this does not always have to be an incoming attack. What if some country has a resource that your country badly needs, without which your people will suffer badly and imagine the same is true with the other country. How much of an hit on economic and QoL are you willing to sustain before you ask your government to go out there and get the required resource by force.

I totally get that war is profitable, and most of the wars cannot be justified. But ideas like this sounds like sabotaging your own country and thus your own existence.