Notre Dame's schedule is setup year in year out to ensure that they win at least 9 games per season...they play power 5 teams, but they play the lower tier teams from those conferences w/ a marquee matchup thrown in for good measure.
Ian Book has beaten the #1 # 2 #4 teams in the nation. He beat #1 Clemson (#1 Defense) in a shoot out with out Trevor Lawrence though. For comparison, Zach Wilson (2nd over all pick) played six ranked teams and only beat two.