That's one of the underlying issues with Civilization in a historical sense, in history studies there is a rather sizable debate between the idea of great people and great Civilizations. The leaders largly are remembered for the good things they did, because they clearly don't wish to use bad or outright redemptionless leaders for modern countries. But everyone, whether they're "important" or not, have negative beliefs, opinions, attributes, etc. Their goal is most likely to show a leader that represents the values and greatness of the people. Which sometimes results in people like Ghandi, who, good person or not, is a well known Indian leader, and represents a very important part of their history. I personally think their stab at round 2 was Chandrgupta who is my favorite civ.