Yeah, you are right, gambling favors the rich, and that's the truth. However, people take it in another sense. They think gambling is biased and favors only rich people, but the reality is that rich people have a large capital, which gives them the freedom to engage in it. They have the luxury of effective risk management, which comes only from their wealth ,something that poor people do not have. That's why we perceive gambling as biased. One more thing, if we look back, we can see that it was primarily rich people who engaged in gambling just for fun. It would not be wrong to say that gambling is a rich person's invention.