I agree with you. MBA is a loser's course. But then considering we "losers" making all the money in the world, its not such a bad bargain after all :)
I believe the MBA student must do a lot of extra reading other than just his textbooks. So it doesn't really matter whether Peter Druker is part of the syllabus or not. the key here is innovating on Druker's or any other management guru's postulations and not just adding another book to the "I've read that" list.