it's a competition with a rigidly defined ruleset which allows a winner and a loser to be declared based on the predetermined rules of the game.

it's why things like cheerleading or ice skating or gymnastics or diving are weird because winners are determined via "judging," which creates an objective factor in the competition, which generally creates for a poor game. it would be like calculating style points into a person's "score" at the end of a game of chess based on how they played instead of just saying one person won, one person lost.

anything with an objective factor like this is generally understood as something different than your typical game.