And University of Nebraska, and University of Wisconsin Maddison, and Texas A&M, and Ohio State, and many others.
It seems like you based what you said on some vague notion of prestige, but if you look at the courses offered/required, the topics covered, and the books used of any of the schools I listed, you’ll see it’s effectively the same education as Harvard and the rest.
Unless you think there’s something magical about the professors at Harvard that enables them to teach undergraduate classes far better than professors at state schools, there’s no reason to assume the classes are any higher quality.