Quantum mechanics is demonstrable on a lab bench (or smaller), so your counterargument is completely wrong.
Any useful consequence of a physical effect is, in effect, an experiment that could test that effect. So if the smallest test is with a machine the size of a small country, no device using the effect can be smaller.
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Quantum mechanics is demonstrable on a lab bench (or smaller), so your counterargument is completely wrong.
Any useful consequence of a physical effect is, in effect, an experiment that could test that effect. So if the smallest test is with a machine the size of a small country, no device using the effect can be smaller.