But I did not say "every guy was league average or better"? What I said is that for the players listed there who started their career in the late 90s their eFG in the rookie season was about the league average or even slightly better. Not everybody there started their career in the late 90s, so it does not apply to Trae Young, Devin Booker and Kevin Durant. So what you have is indeed league-average ot better shooting for the remaining with the only slight outlier being Allen Iverson, who even in his prime was often being labeled as inefficient for a star. Again, Keyonte's rookie shooting was more than 6% worse than the league average: he is simply in a (bad) tier of his own. I am pretty sure that there are examples of star shooters who started 6.5% below the league average but it would be a very, very rare instance.