NBA Draft is so dependant on potential and that is what is hurting the game.
Doug McDermott is having trouble getting off the bench and on to the court right now because he cannot guard anyone. Offensively, he is starting to be able to help out, but he is such a liability on the defensive end that he is hurting the team.
Now, Doug was a senior when he was drafted and Henry is a freshman so I am sure scouts and GMs will say they will be able to teach him defense, but that is the inherent risk of the NBA draft.
Henry has 6 months to get better and I am sure he will, on both ends of the court. And then he will be drafted in the middle of the first round.