dominance in jump racing

The growing supremacy of the Willie Mullins stable in National Hunt racing begs the question: is it damaging anybody or anything? Dominance is the raison d'etre of elite sport. When Rafa Nadal was winning 14 French Open tennis titles it never entered his head that what he was doing might be harmful to the game. Manchester City won't be thinking that five Premier League title wins in six seasons is quite enough, thank you very much, and that to make it six in seven would be detrimental. If you're preaching...