We aren't talking about teams here. We're talking about QBs. The Dolphins are a solid all-around team. What does that have to do with what was being discussed, though? You posted red zone QB rating stats to try and say Prescott hinders us in the red zone, or that he isn't good in the red zone. If he hinders us in the red zone, how are we 4th in red zone TD%?
I'm not sure what your point is anymore, but you're clearly missing mine. You posted those meaningless numbers to try and make some point about Dak because the Cowboys sit middle of the pack in red zone QB rating. Never mind that you need a whole lot more context/data than just that, but I took it at face value and gave you the Browns, San Francisco, and Minnesota cases. You dismissed them. Why? Am I supposed to believe Ryan Tannehill is better in the red zone than Tom Brady, just because his red zone QB rating is higher? Am I supposed to believe the Browns QBs are better than Prescott, Wilson, and Stafford in the red zone because they have a higher QB rating? I'd bet if you ran the appropriate tests, there wouldn't be a significant difference between #1 and #14.
My batting average point had nothing to do with the significance of a hit and of a touchdown. It was merely pointing out how a handful of plays can drastically change stats like that. Those QB rating stats could change drastically by next week. I'd bet there's a lot of change in that stat week-to-week. It also doesn't appear to correlate too strongly with red zone TD% (again, if the appropriate tests were run...).
Your red zone QB rating stat is meaningless by itself. Show correlations. Show additional data/context. Most of them don't support your weak argument.