Not surprised Gardner opposes the study of political science. That guy knows nothing about our country and its government.
We need in our society people who have studied in depth a specific subject, and that applies to almost any subject. More than that, studying in depth even a seemingly useless subject educates a person into how to understand a subject in depth, which can be applied to new subjects as they come along.
Better yet is knowing multiple areas. If you are an electrician, who also has a degree in business administration, you can run an electrician business very well.