"some of the biggest gains in tech come during war or threat of war."
This assumes that tech could not have developed without war, the need for computers would still come from physics community, the idea that "war is great because it gives us good tech" is bullshit, war is justification to spend money and plunge the government into massive debt for the private profits of a few wealthy individuals and corporations.
The truth is the possibilities are already pre-defined by nature, every technology we now have was always possible a million years ago. It would just take time for people to develop it, just because certain technologies were developed for war does not mean technology would not have naturally developed anyway due to limitations of one sort or another.
The truth is war technology fallacy says more about the sorry state of human beings biology. War does not give birth to technology, human beings were inventing tech all along regardless of whether it is wartime or peacetime.