Yes, we also make money via agriculture although often times it's really just contaminating our environment for short-term profits (almond growers in california). We also have a vibrant manufacturing sector, although most of it is in high-end costly items because we can't compete on price for the cheapest items. We also have a huge health sector which is based mainly around rent-seeking rather than quality of care, and its main contribution seems to be causing medical bankruptcies.

Nor did I ever imply these other industries didn't exist. It's just that they aren't our lifeline to viability long-term because many countries could produce the food and physical products we can, but don't have the infrastructure to support high tech companies.