Yeah, delegating roster construction to another person in the program sounds weird.Browsing IC I think the Cheats' idea of a GM is different than Rachel Baker's role at Duke.
They want an NBA type GM who will take control of the roster - identify and acquire HS and portal talent, leaving just the coaching to Hubert. I can't see this working in college since there's no President of Operations or anything. Somebody has to be in charge.
That's one of Jon Scheyer's chief responsibilities with assistance from his coaches. Can't imagine him bringing in somebody additional for that task