“It hardly seems that relatively few students in the best MBA programs majored in business as an undergraduate.” (#27)
This suggests relatively few business majors in relation to a master’s in business. Graduate programs in fields such as English, physics or math have a much higher correspondence between undergraduate major and the graduate degree being pursued. You have not even established that the most popular undergraduate major, among the many majors for the students at some of these MBA programs, is business – in contrast to economics – @whenwhen.