BCS games are nearly meaningless compared to a Big 12 football championship. In two years, there will be no such thing as the "BCS." In another 10, people won't even remember that those game existed.
Finishing second in the North and winning an exhibition game against a team from the worst major conference in football is hardly worth crowing about, relative to the prestige of a conference championship in one of the best conferences in the most important sport in America.