NO was the #1 seed in the West before Zion went down. If he is healthy, they can compete with all of those teams. That is why they will not trade him until they are 100% convinced he will never stay on the court.
He is an MVP caliber player putting up Shaq-like offensive numbers to start his career. If you panic-trade a 23 year old and then he gets it together professionally somewhere else, you will never run a team again.
For argument's sake, let's say they traded him to the Knicks for Randle, Quickley, Grimes and every first NY can trade, plus swaps. Now imagine Zion playing 80 games in NY this coming season, he leads NY to a top-two seed in the East and wins MVP while becoming the biggest star in the league.
That disaster scenario is running through David Griffin's mind as well as NO's ownership.