That's unfair. I know a few people who have worked HR, and they were largely of above average intelligence and aptitude. However, they are responsible for a wide variety of tasks, of which hiring and sourcing, from janitor to director to .NET programmer.
They often lack the scope of the target domain, but that does not equate to a lack of common sense.
They often lack the scope of the target domain, but that does not equate to a lack of common sense.