I think that's true for some key components of the military, but for example, anything involving AI systems necessitate cutting edge chips. You can probably look to the effect chip shortages had on car manufacturers to see how much of this likely works. Cars manufacturing wasn't entirely halted in most cases, instead they had downgraded functionality. Less automatic windows, more window cranks. The totality of every military system isn't based off high end chips, but some of it certainly is.