You straw-manned the shit out this situation. It's crazy to ask anyone to come in here and do what Duke is doing. No other program in the sport is on their level right now. But that's largely because they've had back-to-back NPOY freshmen who were built-in, can't-miss talents and also happened to be Duke fans who were never going to play anywhere else. That's highly unusual and won't happen every year. And Hubert's had a very long leash to this point. UNC's been plenty fair to him.
There are coaches out there who can get top HS talent, develop it, and also hit on portal additions consistently. We just don't have one. In the NIL era, what we're seeing now should be the absolute floor for UNC basketball.