In sports, there is always someone winning dominantly. It can get to a point where they are almost always expected to win. By that point do you continue to bet on those favorites to keep winning or does it bore you? Would you enjoy stirring it up a bit just for the fun of it and betting on the underdogs even if the chances are quite low?
If I'm not mistaken, someone made a thread about betting on one favorite team throughout the season. Maybe the strategy can be done for teams that really dominate the league with very little chance of losing or drawing. So if done consistently, it might still give profit to gamblers in the long run.
If you bet for profit, I guess there will be no boredom as long as you win bets and can still do it. I'm not sure, but maybe I can't do this.