That is correct and that is specially true if you play on games that are based on pure luck. But with games that require skills to have more chances of winning like poker and sportsbetting, these can be a good source of income.
I think it's fair to go in to gambling, with slots especially, with the mindset of making profit.. After all profits are the biggest reason that we do gamble when it all comes down to one reason. Anyone saying otherwise is either lying or have never gambled
You also realized that since today's slots are digital, it can actually be manipulated to allow those people that the casino want to win, well, win? That's the thing i don't really like with slots. Too much isn't in your hands and the odds are even way lower than dice
agree though it is really easy to play the slot machine and easy to bet but still we dont know if it is really legit or not because sometimes those owner is really doing something not to win or manipulate the results, though sometimes those legit slot machines could give you a lot of money and one time cash.Mostly of the slot machine now in casinos is really not legit because you are basing on the machine and not on your self unlike card games or dice games.
On the other hand, card games really gives you the full control on how you manipulate your card and could lead you to win the games. When we are likely talking to winning mostly you have a high chance on winning on card games than slot machine.