Imagine a league of 12 teams with perfect parity, say the object was to flip an honest coin. You have say 16 contests in the year, and you'd end up, by chance, with teams having records ranging from about 4-12 to 12-4, obviously most would be in the 6-10 to 10-6 range. It would be exceedingly boring (to me), perfect parity, and a statistical outcome that varied each year without regard to who was "better", as better would be impossible.