Players are trying their best to win; the games are on the level. If you lose that, if the games are fixed or the players are motivated by something other than the competition, the whole thing collapses. (This is why sports gambling was banned for nearly 100 years after the Black Sox scandal; it was understood by everyone involved, until very recently, that players and coaches gambling on their own games was sports' third rail.) There's no reason to watch a game you can't believe
The referee's report of a football or hurling game is final. His or her declaration of something within that report doesn't just carry most weight, it carries all of the weight. Unless there is incontrovertible evidence to the contrary.
"In the Matter of: Peter Edward Rose, Manager, Cincinnati Reds Baseball Club," attorney John N. Dowd summarized the gravity of the findings. "Betting exposes the game to the influence of forces who seek to control the game to their own ends. Betting on one's own team gives rise to the ultimate conflict of interest."