Why do we outlaw libel and slander? "Reputations are easily damaged but not easily fixed, and libel and slander can cause very real economic and emotional harm." Those are arguments that libel and slander are bad things, which I think is true. But "bad" does not imply "ought to be illegal," nor does the fact that someone else's actions may cause me substantive harm.
Democracy doesn't scale. It works fairly well for governing things like cities and towns, but on a scale like that of the United States' federal government it just doesn't work. The evidence of this is all around us, from low voter turnout to the stranglehold the two-party system has on the federal government, even as both sides converge more and more. This problem is a form of the free rider problem, caused by a kind of prisoner's dilemma.