I was once told by a wise man that opinions are like armpits: everyone has them, and most of them stink. While we may wine and mumble each time we see a person ranking head coaches, we must always remember what it is based on: an opinion.
Rankings are overrated, I agree. Rankings, as fun as they can be, are not a true metric that determines how good someone is at their profession. However, rankings can be a good conversation starter, and they can help us get through the dog days of the football calendar.
Every offseason, there is always the infamous Mike Tomlin conversation.