No we're not career football people... or whatever you seem to be going for here. Of course we're not directors or producers either, but we can tell when a movie sucks. Neither are we music industry people, but we can tell when a song sucks. No one goes to a bad movie and thinks, well, I better not give my opinion on this piece of crap because these directors and producers know more about movie making than I do. Similarly, an NFL game is entertainment, nothing more, nothing less, and the consumers of that entertainment, those who purchase tickets, merchandise, pay for DirecTV, etc., will, until the end of time, point out crap when they see it and have wasted hard earned money on it.
Beyond that, I fail to understand why some have this compulsion - a Colts fan's duty - to defend Grigson and Chuck. Grigson and Chuck are no more the Colts to me than Lindy Infante and Jim Mora were the Colts. I was a Colts fan long before they arrived. I'll be a Colts fan long after they are gone.