I'm not downplaying it. Jacoby had similarly high numbers that were not representative of his play before he got injured. due to the nature of what he was doing to get those numbers - relying on a ton of YAC, on extremely safe play(low int-> higher ANY/A, low INT%, high completion % due to lack of difficulty of the passes, etc.). I think Carr is about average QB in the league. He is what many here wished Jacoby would be, but wasn't. He was very good in what he was doing... just what he was doing wasn't high reward type of play.
He was better than what Brissett was doing when we were 5-2. The problem was that 5-2 was not representation of the real performance of the team and a lot of things were not sustainable. A lot of indicators were pointing to us being more a .500 team than that 5-2.
This is an objective view of Derek Carr's passing numbers this year if you want to focus just on YPA:
You are getting a Top 9 QB in the league in YPA, top 4 in INT%, Top 8 QB in yards, and Top 2 QB in completion percentage. I am sorry, you are downplaying the reward aspect if you look at this objectively for 2019. The last 2 years, Carr has had 7.3 and 7.9 YPA and the last 2 year numbers are the BEST of his career by far. You will be getting a QB getting into his prime if you get him.