I feel like that was the debate with Jerami Grant too - his Freshman year. Could he play more minutes? Nope. He wasn't getting minutes against good teams, all he can do is dunk, raw, wasn't ready. Then, Fair got hurt, and it was like, "ohhhh, maybe he can contribute against good teams." So, I do think sometimes that "nothing" isn't an accurate representation of skills.
It was the same with BJ Johnson. He can do a lot - but he just can't hit shots yet! Except any game he played long enough to hoist a few threes, his percentage on threes skyrocketed...because, I'd guess, being on the court after you miss your first shot matters.
Goodine suddenly looks less clueless when taking over for an injured Buddy...
I tend to think there are reasons why these under-performing kids seem to do better when some injury suddenly thrusts them into situations where they have to play 20+ minutes.
I don't know.