We could use Zheng He or Christopher Columbus instead, I guess? Though one has the disadvantage of no one having a clue who he was and the other is problematic

We could use Zheng He or Christopher Columbus instead, I guess? Though one has the disadvantage of no one having a clue who he was and the other is problematic to anyone who is bothered by the stuff he did. But why was it unique? Why couldn't it be duplicated? Why shouldn't it?