Six out of those eight teams made the postseason. One of them won a playoff game.By the logic you are following, Baltimore, Chicago, Seattle, Dallas, Buffalo, Houston, and Tennessee all should have made deep playoff runs.
The Steelers did neither of those things in 2018, despite their talent and minimal injuries.
Unfortunately for the Steelers, Empirical data doesn't win football games. Two recent Super Bowls (Seattle and Atlanta) were lost because the OC decided to go with the "empirical data" and chose to throw the ball.Agree with it; don't agree with it. But we have a situation where "conventional wisdom" says one thing and analysis of the available data says another. This happens all the time in all kinds of circumstances. I'm going to go with the empirical data because that is how my mind works - your individual mileage may vary.