It is, but I am talking about punditry. Politically charged opinion. There are far more honest music, TV, poetry, and fiction critics than purely honest political pundits. It is far more likely that one critic will change another critic's opinion about a movie than that one pundit will change an opposing pundit's opinion on Planned Parenthood. Or Obama. Or guns. Or terrorism. This also goes for economic and religious commentators. An op-ed columnist and their kin at various online outlets are warriors for a cause--usually of a hundred causes, each addressed with the same pretense of expertise. A movie critic tends to focus on a limited area of expertise, and is thus more likely to thrive as a writer.
Criticism, aside from even being an opinion of whether a given piece of art is good or bad, makes you appreciate things on a deeper level. A film critic makes me a better viewer, and that is cool. A pundit can make me a better citizen, sure. Too often he just makes me an angrier one-- at him or at those dumbasses who have the temerity to disagree with us on what is so obviously the Truth.
So, my official stance: Read criticism as much as possible. Read opinion sparingly.