In the United States, it is quite rare to find any professional or college or amateur sport which does not have some form of a post-season series to determine the champion of that sport, that is a number of events which follow the regular season. The baseball World Series, the Super Bowl of the National Football League, "March Madness," and college football playoffs for the Division IA, II, and III teams and the Bowl Championship Series, as well as many other sports. When NASCAR created the Chase, it was simply following a well-worn path, simply adjusting the post-season concept to fit the series.
This is not an entirely American phenomenon, though. I am not very familiar with non-American sports, but the ones I am familiar with do have playoff-style championships. The World Cup. The Olympics. What about Rugby? etc., etc....
NASCAR deserves credit for innovating, not flack. Motorsports are now less homogenous.
