You are right about that, casino operators are always responsible for making money much more than the players themselves, players are quite positive when it comes to playing, those who are luckier are those who manage to win, and those who bet with good money and win , Well that is where you can see the good in all this, of course this is what is sought, but primarily to be Able to win you must have patience, great money management and acceptance, without this it is Difficult to bear losses.
The thing with casinos is that in the long term you are expected to lose money.
So, in a way, you just need to be lucky, once, and then stop betting forever, if you want to win money.
Now, of course, most players never ever see that lucky game, so they continue to bet their whole life without ever winning more than what they put in there.
In fact, I saw an interview with someone who kept all his lottery tickets, and despite years of playing, he never won, not even once. And guess what? They already spent millions for that.