Last time I checked it wasn't even considered a sport. Maybe things have changed.
The definition of the word "sport" covers a very large ground. It has been used in many ways over many centuries.
What is "the sport of kings"? --Betting on horse races. The word has been associated with gambling for centuries.
What is the content of the magazine Sports Afield? --Hunting. A sportsman has been a hunter for centuries.
The International Olympic Committee recognizes both chess and bridge as sports.
The agency for which I teach technical diving, TDI, uses the term "sport diving" to define recreational diving that is not technical in nature.
The idea that an activity must contain an element of physical competition, which is what most people think of today when the term is used, is actually a fairly new limitation of the definition.