The founders assumed that people are better at governing themselves than rulers are. Turns out, the founders were right. Would you like some examples?
The founders did
not assume that people were better at governing themselves than rulers were--in fact, they outright rejected that entire idea. Yes, they thought people should have a
say in the government, but not that they would
govern themselves. That's why in the federal government, laws are not passed by the people, but only by their representatives. There is no shortage of quotes from them expressing their--sometimes justified, sometimes not--fears of the problems that would result if the general populace had too much direct power over the government.
Even in that area, only the House of Representatives was actually elected by the people--the Senate was elected by state legislatures, and the President by the electoral college, deliberately moving them farther away from the general populace's choices (in each case, the people didn't vote for senators or president, they just voted for people who would then themselves elect them). Now, nowadays Senators are elected directly by the people, and due to the electoral college just being a bunch of popularly elected robots at this point, the President is--functionally--elected by the people, just with a weird counting mechanism for deciding the winner. However, neither of these were the original goal. And even now, with the executive being elected (functionally) directly by the people, and both Senate and House elected directly by them, people aren't governing themselves. Federal laws do not go up to the people to vote on; they go to their representatives to vote on. People still have only an indirect say when it comes to the federal government, as was the goal. There's no such thing as a nationwide referendum in the United States.
So no, they did not assume people were governing themselves than rulers were. Again, they thought the people should have a say in who was governing them, but not that the people should be governing themselves and being the direct deciders of what laws get passed.
There's an historical reason for this. Can you guess why? Hint: woman's suffrage was first a western thing.
So you acknowledge it isn't, as you claimed, a red state vs. blue state thing?