You must have heard of "ten bets and nine cheats", and there are many liars. After washing his hands, a former gambling king talked deeply about "ten gambling and ten cheating" in casinos. In other words, even if you get a high chance of winning by using mathematical probability knowledge, you will be defeated again because of your opponent's cheating behavior.
Even if you win a game or two occasionally, it's just that they are setting a trap for you and leading you to the abyss they have already designed. So always remember: the harm of gambling is huge, stay away from casinos!