You're not wrong and that's why he pointed to it as a chance to see if anything has changed.
If the goal is to have Dabo or Saban as your head coach, I am > 95% confidence level Manny is not that. Also, keep in mind you are talking two guys who will go down on the Mt. Rushmore of college football. Most likely, due to the nature of the school, program, alumni base, Miami will NEVER have one of those guys as the HC, or at least for very long.
For me, the goal is to have a guy who doesn't lose you games and continues to grow into his role. I hold onto the fact that Manny has grown from year one to year two. If he shows some signs of growth and the team goes 9-2, I don't see how we couldn't be happy with that. Then it resets in year three and you want to see growth in areas again. Isn't that what you would expect from any employee in any walk of life? I tell my analysts at their review that if they are the same person at this point next year, their review will be worse, not the same. The expectation is continued growth.
I see no reason why it would be different for Manny. He's learning and improving. Gotta see if he has the key aspect, which is the ability to make people better than they believe their best is. It is a rare skill, believe me. Outliers are outliers for a reason and Dabo and Saban and Urban are outliers, not the norms.