Because it is gambling and these are programmed so that you can not intervene. A Random Number Generator ensures that the roller stops, and that the cards are revealed. An intervention is not possible. The games equal to a high security tract. Previously, when the machines were still manually operated in the casino, you could manipulate with magnets and other tricks. Digital is not possible anymore. Do not try. Otherwise you get free cards in the jail. Take advantage of the tips you receive or think positively. But by no means you are allowed to play hackers.