In gambling, there is not just a risk of losing, but practically a guarantee that you will lose your money at a distance. I think this is the most important thing to understand. Knowing this fact will save a lot of time, nerves and money for any gambler who is trying to make money on gambling.
Maybe most gamblers will lose money in the long run but not everyone, otherwise, gambling is not winnable and it's opposite to my belief and to the people who are making a living in gambling. Though it's hard to prove that there are people who really makes a living in gambling, but based on what I read and see, I believe it really exist.
You read and see stories that make you believe in the possibility of winning because casinos pay to spread/make up such stories
In fact, this is a simple mathematical problem, the smaller the variance of the random variable (the higher the distance), the more guaranteed the casino will win.
In fact, you can only make money if:
1.) You have found a bug in the casino software and you know how to use it.
2.) You created this error (hacked casino software). It's illegal.
3.) You use multi-registrations and botting to receive bonuses and other promotional offers. This is also illegal.