You're "sure"? Why, exactly? It was reported all over that Monte attached a hefty price tag to the 4th pick if any team wanted to trade for it. Should he have bent over and taken less than the asset was worth just to satisfy your certainty? It was likewise reported that Detroit had significant interest in Keegan Murray and may have been targeting Murray rather than Ivey with their pick. Unless Detroit was going to be Monte's trading partner, there was a chance that Murray would no longer be on the board if the Kings traded back. If you can't appreciably improve upon your talent level by trading on draft day, it's better to just take your guy and go home after you've invested your time scouting him to determine if he is BPA, which we already know is Monte's MO.