Casinos are actually making incredible amounts of money, and it's all because of the gamblers that simply cannot stop.
There are basically zero people that have become rich through gambling (there are a few, but so few that they are basically zero), but all the image that everyone has about a casino is that it's a place where you have a chance to become a millionaire.
The math tells you the reality, and it's quite different. Only the casino owners get the millions.
Only few have emerged victorious in this activity. Those who know how to handle their finances after having their winning streak. Because if you will go back again after a win, you already know where it is heading. The house edge is real so in the long run, it is the house that will have the advantage of earning from this business.
Even I feel that out of 100 attempts, there is no chance that we can definitely win even once, it all depends on our respective luck whether we can win or not. I agree with you, let's say we play 100 times and win once, will that return our total losses? I don't think so. This is what happens, some people are very happy when they win, but they forget how much they have lost before getting a big win like that. That pattern will continue to repeat itself, and maybe they will start playing with very high expectations that eventually they get caught up in addiction.
That's the hard truth in gambling. In actual accounting, we have more losses than winnings. However, the temptation and the desire to play are always there. Do remember, just playing with small bets will give you the addiction mode. Most of the time, you won't know that you are indeed enjoying the game, hence, you keep on playing and depositing to the casino.