The reason I don’t worry about the house being honest is that casinos here make so much money legally that they would be foolish to even contemplate cheating. When you have what amounts to a licence to print money, why risk it all by cheating the customer? Additionally, think about how casinos might try to cheat. Since the house on average makes the most money when 7 comes up more than predicted, how exactly would you make the dice come up with more 7s? Fair dice actually maximize the chances of 7s coming up, as it is the most likely predicted number to come up