The biggest reason why the gambling is more successful business and it is always risk for the gamblers when the gamblers win the bets they will play for more to earn more but repeating the same winning is not possible for many times so they are going to lose more money than winning and the people who lost their bets keep trying again and again to recover from their loss so they also going to lose more money if they play more.
I guess its human nature that when they start to win, they will continue and will not stop until they feel they need to stop like when they don't have money anymore. Self discipline and self control should be practiced at all times. If I play in real world casino, I would bring someone with me to remind me when to stop. Online, I would set a limit on when I need to stop and access to my extra funds should not be within reach.
There is no doubt that we all like the idea of winning, but that is what makes a whole lot of us different. As much as we want to win, what make us different are our mindset and the idea of trying as much as possible to never stop facing reality.
The reality is that gambling is nothing than a game of luck and the chances of losing are more than winning except you are just in a big luck. So trying to want to get yourself exposed into too much gambling, while focusing on the winning alone, can get you drained emotionally, mentally and pocket wise as well which the best practice is never to just stop removing your mind from the idea that it is just gambling, not a profitable making venture.