Any seasoned bettor will understand the feeling. If one result doesn't go your way, then all those other correct predictions are out of the window. Acca insurance is a savior for those bad decisions of your life.
Betting is amalgamation of luck and skill. If three out of your seven predictions are incorrect, then there is always a possibility of losing the stake. However if only one out of the seven doesn't go your way then that really hurts , then offcourse bad luck has trumped your betting skills. In such a situation, Acca Insurance acts as a damage control for you.