Probably gambling is a game of chance and many people do say the same thing, if you are also a regular gambler you would have known that wining in the gambling is a chance and as a gambler you will not know your prediction that will bring wining for you, that is why do says that gambling is a game of luck, they are some people who will gamble from now till next year they will not win any thing and they are some who will just gamble today and win instantly,  that will make you to believe that wining gambling is by chance