To succeed him. Not to replace him.
Ben Gordon was an incredibly talented basketball player. Who played with one fifth the day to day intensity that Taliek did, which was why Ben even his junior year got pulled and lectured all the time while Taliek stayed on the court.
I'm not saying Taliek was a better player, or more important to the team, than Ben Gordon was but you are giving too little credit to being able to defend and play mistake free basketball, with leadership, for 35 minutes a game night after night after night.