Everyone starts gambling in the first place for entertainment but gradually when the amount of gambling becomes more then the person becomes addicted to gambling without his knowledge. Then he wants to win every time in gambling but in gambling no one can guarantee that he will get from gambling. You can make profit. Some time you will gain while gambling and some time you will face loss. Now if we can't accept loss it can cause big problem for us.
Trying to win all the time shows that the gambler will be losing most times because a loss will lead to chasing to recover and as you do that emotions starts coming in to get you further confused. If you get in the game of gambling and you are losing, the best thing to do is to stop and not to continue till when you have been emotionally stable. So playing with the believe that there is a guarantee that you won't lose is a fallacy, have an open mind to what you bet either you win or you lose and that is why you have to bet responsibly.