Huh? That´s a strange conclusion.
You´re basically saying:
In lower leagues, rookies are contributers, therefore the lower leagues need a D-League more than the upper leagues, because when rookies actually can contribute, the need to put them into a D-League is much higher.
Excuse me for not beeing able to follow that path of logic.
Zwei Dinge sind unendlich, die Dummheit und das All...