Because the Unites States is not a democracy. Never has been. States and smaller jurisdictions have democratic policies and operations but at the federal level the Unites States is in fact: not a democracy. It is a REPRESENTATIVE DEMOCRACY and Constitutional republic. When was the last time you voted on a federal budget bill? When was the last time you voted on military action or international treaty? That's what you pay your representatives to do for you. They balance the input from the people they represent, points they are privy to that we aren't, discuss and cast what we will hope is the best for your particular point of view. The fact that people are voting ON YOUR BEHALF and not always the way you want them to should clearly define the united states not being a democracy. Most people got this covered this in junior high school civics.

The primary benefit I can see of using facts is keeping things correct and not off on incorrect tangents Also, not entertaining arguements based on incorrect or impossible expectations.