What's your opinion about this please?
It is common in my country for people to blame demons for their mistakes, carelessness, foolishness, and mediocrity. When criminals are caught they always blame Satan for pushing them to engage in the crime. If you were oppurtuned to know this man's gambling history you will be surprised that he was a careless gambler who never took any precautions during his gambling days. After he had lost so much, he would generally blame demons.
His claims are false because it has no scientific or even religious backing. This mindset is one of the superstitious beliefs that people blame after they have failed to do their homework. Anybody familiar with gambling will know that the house has more advantages and if you are not comfortable with the area arrangement it will be better to stop gambling than to blame demons.
It's easier and more convenient for people to blame others, circumstances, devil, demons and the universe for their mistakes and wrong decisions. The old man in the story was probably an irresponsible gambler or an addicted gambler, so it was easier for him to blame the devil and demons for his failures in gambling. We should know that we're responsible for our actions and neither God or devil can make our decisions for us, so people should stop blaming devil and demons when they lose in gambling because they're the ones that chooses to gamble, knowing that they can either win or lose. The assumption that gambling is from the devil or inspired by him is baseless, just like some people in my country will tell you that very rich people are in secret societies and it's devil that gives them riches, they're all assumptions of the poor..