Fundamentally important so that smaller states can have equal power in electing individuals to larger ones.
For example, without the electoral system, the states of Wyoming, Vermont, Alaska, North and South Dakota, Delaware, Rhode Island, Montana and more would be utterly eclipsed even if just half of California voted against their candidate.
The reason why many historians regard the printing press as the most important invention of the past millennium is because it allowed for thoughts and ideas--and thus things like revolutions and large-scale changes--to spread far more quickly and effectively.
