""I would have thought nothing replicates the intensity of a game, why risk losing fitness and that game like intensity body/feel for the game?"
I always thought this; and always wondered how players got so good and were so ready for NBA with playing so few games (Darius Garland looks good, you saw what Kyrie did despite only playing 11 games for Duke etc)."
There's no doubt that Training and playing in the NBL will greatly benefit Ball, Hampton, and Didi. And yes, more so than the G-League (in Didi's case.) And I also think NBA recruiters are smart enough to see that.
But its also about showcasing.
And in the case of College, especially for a 1 & Done star, I suspect that College is little more than confirming he's as good as everyone thought.
College-ball, for someone like him, is basically one big highlight real, playing against a bunch of kids.
Besides, I would imagine that once he leaves College, he's free to start signing endorsement deals, or at the very least he can keep accepting freebies without worrying about his status.