Sports is full of rules. War has no rules. Playing fields are always level. Battlefields are rarely level. Sports is civilized.
War is barbaric.
Wars end with triumph and dominion or death or surrender. Business is not regulated by rules of war. Microsoft tried mightily in The Trial to convince Judge Thomas Penfield Jackson that the computer and Internet worlds were battlefields, and that every competitor's very existence was under constant threat. There was no way Jackson could buy Microsoft's argument. There are rules for competition, especially between monopolies and less advantaged companies.