Thus, the question is: Do you want the majority of the USA geography being controlled by the will of people least knowledgeable about it?
If you eliminate the electoral college you give political control of resources to those who have absolutely NO physical control of those resources and yet still suffer the impact of their environmental influence.
What I mean is, people in California, Texas, and New York would push all the bad things to the rural states and take all the good parts, leaving those who live in the rural areas to feel the full brunt of those decisions. Take Louisiana as an example. It's been decimated by everyone who doesn't live there.