Of course something trained on humanS can possibly outperform a human. Is it a mystery to you that a tug of war between humanS on one side and a human on the other will have a known outcome?

Less facetious example. People have created 'averaged' faces (using machine learning) across all men and women and also across men and women of certain races. Is it a surprise that these 'averaged' faces are more attractive than the average person?