He just put up historical defensive numbers for a player his age. He's already a top 5-10 defensive player in the league
The first sentence is true, the second isn't.
In terms of blocks and steals, very few players have put them together in combination like Noel has. He's an active defender, and fills up the stat sheet.
However, he's still a work in progress. If you look at his synergy stats, there were some areas of defense that he really struggled with.