Alas, people will continue to argues that democracy is the best form of government despite its various flaws.
What's your alternative good?
However, suppose for a moment that you're the revolutionary leader of a small nation in Latin America and, after a long struggle, you have risen victorious over the oppressive old regime of your country and there is overwhelming public support for you to become dictator. But, being aware of the inherent long term problems of dictatorships, you don't want to be a dictator. So, you declare, "We will implement a constitutional republic like the Americans. But, to ensure our government always has the best interests of our people at heart and we are never again dominated by an elite ruling class, we will choose our representatives in the legislature by a lottery like the American PowerBall." What, then, would be impractical about implementing a jury duty system of democratic representation?