It’s a parable. It is thus neither true nor false. Unless you want to claim the events actually took place, in which case someone could comment on whether that was true or false.
It’s like someone arguing about whether the parables of Jesus are true or false. Jesus never claimed there were actually three slaves given different numbers of talents in trust. It was a story to prove a point
Yeah, I get it. But to “de-bunk” it simply based on the fact that the professor didn’t write the article (though he distributed it to his class), is simply weaseling out of labeling it “true” on their website, because it is a good parable of how taxes work.