It is like that because you win money, and people like money
What is that? it is like what? people dont always win in every round even they saying that they are playing it in the smartes way people are being addicted because they losing money and always chasing it people like risking money always.
That's the design of gambling, to put the players most often in losses of money and winning is very seldom to be happen for the gamblers. Even if they win, it will be the reason for them to stay more in gambling for thinking they will win a lot but in the end all their winning amount will be gone.
That is the way it is, gambling site was made for us to experience losing most of the time. The time we entered the gambling world, we must know that addiction will come to us, we must be prepared on whatever is going to happen, the consequences also must be overcome by us in order to not be addicted to gambling.