Your point is well made, but its still not acceptable to prey on the weak as a way to make a living. They are doing more than providing a service here. These machines are not for the average person to enjoy as a leisure activity - they have designed them specifically to extract money from...
There's no need to do that. The laws of probability do it all for you - in just the same way that the existence of the green zero on the roulette table achieves a profit for the house.
I can see no rational justification for allowing these things to exist at all in a civilised society. They exist for the sole purpose of extracting money from people who are vulnerable or who have an uncontrollable addiction. The gambling companies make vast amounts of money out of their...