Well we've been over this a hundred times, what's 101?
The comparative dominance of the Chicago Cubs comes from millions of people growing up with day games on WGN. Also, prior to 1958, the western limits of the major league were the St. Louis Cardinals and Cubs, who each had 50,000-watt flagships and sizable networks. It's just a matter of exposure. The White Sox never matched the media presence of the Cubs, and the Cubs are more important as a result.