First, it would make sense for him. Short of adding some high-quality transfers, ND will almost certainly be either mediocre or terrible next season. Teams with a chance to win it all will want him. Programs that will pay him more will want him.
Second, his deficiencies are in the areas ND has the most need. He isn't much of a distributor and consistently dribbles himself into trouble instead of passing the ball. He's also weak defensively, which is inexcusable, but he's allowed to do that. He needs to be somewhere where he's forced to do both.