You mean the one that said these things?:
"While passing yards are thought of as an individual quarterback stat in the NFL, we know a good chunk of those yards come from the receiver after he catches the ball. That’s why it would be beneficial to separate the air yards from the yards after catch (YAC)."
"If we look at the top 10 quarterbacks in YPA on just YAC, greatness does shine through for the most part:
It’s a lot of active players, but that’s what we expect these days. These are the quarterbacks who play efficiently but also get a considerable amount of help with YAC."
"Tom Brady’s AIR YPA is 3.95, which puts him at 46th with Jon Kitna and Vince Young breathing down his neck."
Do you conclude that Brady is well below average?
All of this tells me that the game is much more complicated and nuanced than you think and cannot be summed up in a single linear correlation between two numbers. Both articles confirm what I have been trying to tell you for this entire thread (and others), YPA is a team stat that is dependent on the QB, receivers, OL, and offensive scheme. Hell, YPA is also partially dependent on your defense. Playing from behind leads to garbage time yards through the air. Air Yards and YAC are related (just not linearly).
Let's put this to rest. No stat tells the whole story. Interpretation of the stats is subjective. If you can conclude that Tom Brady's AIR YPA is not reflective of his skill as a QB, I can conclude that Tannehill's YPA is not reflective of his skill as a QB but of the TEAM'S offensive efficiency. There is nothing at all controversial about that statement. It is entirely logical and supported by what people see on the field.
You are completely wrong-headed about how stats should be used in looking at football. You are on a search to find the stats that can explain the game and answer all the questions about individual players without looking at what actually happens. I think stats are fine as a starting point, but you must watch the game to fully understand the meaning of the stats. That is what happens in real life with people who earn a living at playing, coaching, and managing football and that's good enough for me.