I believe that we have those experiences, and I am sure that many of us losing big money in gambling. It is natural to feel angry and upset when we lose because that is the first expression we did when we got something bad.
But we can not blame the casino because we decide to play with big money or for some time, so we need to introspect what we did before. We need to be wise in gambling. Otherwise, we will lose all the money we have without waiting for too long.
That is exactly what I am saying with that post, it is understandable to be mad and upset over a loss, but that can't be the only thing we could focus on when we lose, you can't just start blaming others for your loss. The problem with this is the fact that it shows the hubris or denial of people as well, a casino comes up and says "if you bet 100 dollars and win we will give you 99 dollars and if you bet and lose we will get all that 100 dollars, that 1 dollar difference is our profit" and clearly explain to you that you will lose in the long run, what do people do?
Well, they keep trying to find "methods" that will go over that and win forever. Whenever they end up losing they keep going "it can't be because of me, I did everything right!!!" and that is really sad, you could have done nothing to begin with because the whole system is not like that.