They do only because of academy bidding.GC want future picks and want to trade out current picks. The need some picks in the 30-45 range for bid matching and that's it. They also want Luko out and Noble in.
They could trade out 13+23 and get 2 future 1st and a future 2nd.
Trade in noble + f3 for 29 and trade out luko +f2 for a F1 and end up with noble and 3 f1s instead of 2