Well that's the thing, It's hard to trade a star unless they want to be traded. Their agents can easily kill the teams leverage, just as Siakam has done, by declaring he wont sign an extension. Or they stating they will only accept such and such a role with the new team, etc. If KAT tells Trae Young he's not interested in coming to Atlanta, then guess what, that trade is dead. That's just how it goes.