What do you mean by rigged, specifically?

I can say for certain that every gambling event in the game (without exception) is "rigged" in the sense that they hide the odds from you while making it look like everything has the same chances of occurring. For example, those "spin the wheel" games show a bunch of possible outcomes all equally distributed around in order to deceive the player into thinking the chances are equal, when they actually aren't, getting players to invest more than if they were honest.