I think you have a good point. Our democracy is based on the premise that voters (the majority, not voters) can make the best decision. 
But what if the voters don't have all the facts that are relevant or have "fake news"? The Framers knew that a free press was essential to keep voters informed. What if the press is misled, misleads or is simply ignorant?
For instance, let's consider the possibility that a presidential candidate through an intermediary, met with a foreign adversary that had intel on his opponent. He learns the damaging information and coordinates his campaign as the information is released through a third party. Voters learn of the dirt on the opponent but neither the press or the voters know the candidate is coordinating with a foreign adversary that wants him to win.
The election is close. Did the voters get enough info to "process" and make a wise decision if they did not know of the collusion? Did the foreign govt swing the close vote?