Despite the NFL being QB needy league, several QB needy teams, passed on him. Poles' malarky about wanting to treat Fields "right" is pure spin. Poles overestimated his value (like you do) and by the time the music stopped, all he got was a 6th. He is a perfect fit behind Wilson who isn't as good as his press clippings and the minute Seahawk defense (many of whom resented the golden child press his got) left for their money, so did his performance since Wilson has never been a guy who can carry a team. His success in Seattle is a good parallel to what is happening with Brock Purdy. You don't have to be a great qb when you have a great defense, OL, top 5 RB , top 5 TE and top 5 WR.
And living in Chicago (but not a Bears fan), I can tell you that Fields can't read defenses. Having watched too many Bears aftergame shows for the sheer glee (I am a Packer fan), they just carped about the reads he missed. When the Bears won, it was because of his legs, when they lost, it was because he couldn't find receivers. The OL just wasn't that bad this year, yet he still missed read after read.
Maybe someone can turn him into Taysom Hill. Maybe he gets into a perfect situation like Brock Purdy.