First, I can't imagine Lucas was confused between the two words. Second, in reply to your point, midichlorians were not used to judge someone's suitability for

First, I can't imagine Lucas was confused between the two words. Second, in reply to your point, midichlorians were not used to judge someone's suitability for ruling, and even if they had been that would be a societal attribute of a fictional setting - not a prescription for reality. They were simply a scientific measure of force sensitivity, at least as depicted in the movie. Would it be wrong in your view to associate bigger lungs with increased breath capacity? Again, that is merely a physical attribute.