In their haste to be wiser and nobler than others, the anointed have misconceived two basic issues. They seem to assume: 1) that they have more knowledge than the average member of the benighted, and 2) that this is the relevant comparison. The real comparison, however, is not between the knowledge possessed by the average member of the educated elite versus the average member of the general public, but rather the total direct knowledge brought to bear through social processes (the competition of the marketplace, social sorting, etc.), involving millions of people, versus the secondhand knowledge of generalities possessed by a smaller elite group.
H/T Mark J Perry at American Enterprise Institute