1) Hurts had more rush attempts than Fields this year. His rush rate was lower than Fields, but he's a running QB and just made the Super Bowl.
2) If the Bears move on from Fields, what's the answer at QB? 5, 10, 30 more years of Jim Miller, Cade McNown, Jay Cutler, Andy Dalton, Nick Foles, Rex Grossman, Erik Kramer? If you've got a great athlete showing improvement, spend the resources on improvements around him rather than giving up. They can trade down from 1st pick and get a lot of good pieces, evaluate Fields with a sufficient team and see where 2023 goes.