The point I am making is a narrow one - that war by itself does not stimulate the economy. The people hired to produce armaments are employed by the government, whether directly, or indirectly as contractors or subcontractors. The government has to finance this by raising taxes, inflating the currency, or raising debt, none of which is good for the economy.
Economics is the science of allocation of scarce resources. The material used to produce those armaments, the labor used in producing them, and the capital used to pay for them could all be more productively used in other ways, absent the war. Given the war, there's no other choice, but in purely economic terms the war diverts resources from more productive purposes to less productive ones.
In addition war disrupts trade, both international and domestic. This is a serious hit to the economy.
Finally, and this is the reason I mentioned the countries I did, it's unusual for a country to not suffer any damage to its infrastructure in a war. (As an aside it should be noted that during the existence of the Soviet Union, and for some years at least following the emergence of the current Russian state, many state owned enterprises actually subtracted value from the Russian economy, as the goods they produced were worth less than the raw materials used to produce them - the destruction of these enterprises in a war would have actualy benefited the economy - but this is a phenomeon found primarily in centrally planned economies).
Having beaten that point into the ground, I hope, back to the game - I disagree that the recession event should be prohibited during a war. I believe that it should occur less frequently than it seems to during beta 5. I also do not believe that every aspect of the game should be made "realistic". We are, after all, suspending disbelief when we suppose that there are alien races, that there's such a thing as hyperspace drive, and that interstellar trade would be possible or profitable. These things may be possible (in time), but they're not realistic.
I have other complaints about the game (that I hope will be resolved during the gamma) but lack of realism isn't one of them.