Stepping beyond your competence can be like stepping off a cliff. Too many people with brilliance and talent within some field do not realize how ignorant — or, worse yet, misinformed — they are when talking like philosopher-kings about other things.
Under democracy one party always devotes its chief energies to trying to prove that the other party is unfit to rule—and both commonly succeed, and are right.
As I have written previously, I find our political class unfit for office in that they may have made a name for themselves in whatever field they worked, prior to becoming a politician, but once having become one they exhibit a total lack of knowledge about national and world affairs. When considering their track record having entered the world of politics it is felt that Thomas Sowell was being a tad kind when he labels them ignorant, or worse yet, misinformed.