Because they’re not a quick strike team. They weren’t explosive in the pass game at all last year. Steve Angeli has thrown the ball well in limited appearances the last few seasons but he’s a statue and they really prefer a running quarterback. He’s kind of the career backup type. They’re likely going to go with CJ Carr who’s an athletic redshirt freshman. Riley Leonard was their second leading rusher last year with over 900 yards and 17 touchdowns. Their entire offense revolves around a running quarterback. Scoring fast while being run heavy is tough.
Also, while Notre Dame averaged 5.7 yards per carry last year against FBS teams, Miami was next with 5.6. So Miami was just as efficient running the ball but also had the benefit of a passing game that could score lighting fast.