Go here and tell me how Cooney is a much better shooter than JGIII - use numbers, it should easy.
Maybe you watched Trevor Cooney's brother Terry - the one who could play? Just by PER JGIII is better (17 to 13 where 15 is average). Girard is shooting 35% from 3 in conference - something Cooney never came close to (peak 32.8 and 29.7% average) taking a remarkably similar number of attempts. JGIII is a better FT shooter and similar at 2s (42.3% to 41.1%) when Cooney's rim drives were legendarily bad. D-rating has JGIII as 102.7 (where 100 is average) compared to Coon-dog's 100.9 average. Joe has more assists, a better A:TO ratio, the same steal%. Even TS% is in JGIII's favor outside of one magical season (13-14) where Cooney lit up a string non-con teams at 51% from three, but then settled down to right around 30% where he usually lived.
ETA: I'm done here - Kadary Richmond, folks.