25,861,298 votes are from the top 10 biggest cities. If you cater to those cities you're in an extremely good position to do well in the general election because the cities are very spread out (NY, CA, OH, AZ, IL, FL etc). It has performed its function for over 200 years (and in over 50 presidential elections) by ensuring that the POTUS has both sufficient popular support to govern and that his popular support is sufficiently distributed throughout the country to enable him to govern effectively.
Not to mention it gives minorities an actual influence..