You're completely wrong because you completely misunderstand that system. No one in the U.S. votes for the President. You vote to assign your state's electoral votes (sort of). Everyone's votes are equal...within their state. Which is how the system is designed to work.
2 different elections take place. intra-state elections where people vote to assign electoral votes. Interstate elections where states vote to elect a Presidency.
A black person in Wisconsin has the same voting power as a white person in Wisconsin. A Hispanic person in Mass. has the same voting power as everyone else in Mass. Your error is that you're thinking about our elections as national elections when, in reality, we only vote in state elections. We don't vote on anything nationally.