The things that a HOF offensive coach, years in the system, and a good line can help you achieve! Fields has never played in a system this good. Even as pedestrian as KC is offensively right now.
There's just always some reason Fields hasn't been that good.
You seem like you've never even considered that he's been mediocre because he's a mediocre, mid-tier starter type NFL QB. It's always someone else's fault.
You mention that the Chiefs offense are pedestrian - I point out that they are more productive than any Fields offense has ever been - you say of course they're good, they have a good line and a HOF coach.
Fields also is playing under a HOF coach. He still leads a mediocre offense.