That's because his mind will keep making statements that one more spin and we can win. But they are just losing again, and it is hard to win. Some of them eventually become addicted to gambling because they lose self-control and don't realize what they are doing is wrong. Maybe there really are gamblers who can reach their target, but that's difficult if you have to do it every day.
Of course there's no one gambler will always win through gambling, this is really a big joke like someone who think gambling can be a main source of income. I think some people who can't control themselves in gambling is just a part of life, even we try to make every people to stop gambling, we can't because we only have a limit time and we can't change every people. The good thing is the casino is keep making money and make them to sustain longer, this is about perspective.
It is absolutely madness for any gambler to actually think he can make steadily win on gambling no matter the game he decides to play there will always a breach where the gambler will have to experience loses and the earlier you start dealing with shits like this then the better because if you let your emotions cloud your judgement or thinking in the course of gambling then you are simply putting your mental, physical and emotional state in a very tight corner
You are right, the normal chances of winning and losing in gambling is 50/50, but for me though, based on my personal experience, say that the chances of winning and losing in gambling is 30/70 , that is a gambler has 30% chance of winning and 70% chance of losing, so with such a stats, it is practically and technically impossible for a gambler to play and not lose, whether it be lottery, sports betting, casino or slot games, the chances of losing is always higher than the chances of winning, so anybody who believes that they can consistently win in gambling without losses is probably a newbie who just came into gambling with the wrong orientation, for such person , I would say that they need a reorientation, that is, they need a total overhaul of their mindset was gambling.