That’s all fine but those things are NOT what our economy has been based on these last 20 years or so. It’s been based on consumerism (of goods mostly produced elsewhere) via unsupportable consumer debt.
That is simply not sustainable as we are now seeing.
Living beyond your means, whether for an individual or a government, is not sustainable over the long run.
My point is that without limitations set on us by our government and our own queeziness with new technologies, our economy could expand indefinitely into new areas. We are not even close to the end.