[harimau777]

I think that the idea is that as much as possible everyone's preferences should be heard and allowed for. The preferences and priorities of people living in cities tends to be dramatically different than those of people living in rural areas. The concern is that a scenario where cities have enough higher population that their preferences are advanced to the exclusion of the priorities of people in rural areas, while more democratic, would undermine ideals of freedom, equality, self determination, etc.