Then it gets justified when we actually win so we will continue playing thinking we can actually decide when to win.
Especially, some consecutive wins certainly boost the confidence of gamblers who think they can decide when to win. Gamblers start to believe they possess skills that can provide consistent wins.
They forget that in gambling, what we do is only to strive to enjoy the game and hope luck comes to us. The more confident the gambler becomes, the more likely it is to increase their gambling activities.