I could rephrase:
"More on big cities and less on sparse populations"
That doesn't change the original argument.
The spirit of the argument is this: should the electoral college be abolished, the winner of each election would largely be chosen by people who live in metropolitan areas and inner cities, because there are more people there. The interests of people who live in rural and frontier areas would be lost, because there are fewer of them.
Hence, the system is intended to insure that the interests of a minority (people who live in rural and frontier areas) aren't drowned out, because so many people live in cities and suburbs.
It is a way of leveling the playing field, to protect a minority population.
See where I'm going with this?