People with jobs in the producing economy tend to be much smarter than public servants, charity cases and students.
Those who survive off the labour of others can afford self-indulgent speculations; a world of theory. Those who have to produce to survive are thrust in the direction of reality.
The gradual replacement of productive labour by non-productive labour is one of the symptoms of the end of civilisations. They begin to feast on delusions and end up dying of hunger.
Understanding reality can produce valid theories. Understanding theories cannot produce a valid reality.