Generally, all casino games are designed to make gamblers lose, and we must realize this from the start because sooner or later our bankroll will be depleted. This is where most gamblers miss a crucial point that should be recognized from the start.
Remember, this is just a game of chance, not everything. We can get lucky, but losing is inevitable. Any winnings we achieve, if we aren't careful in our approach, will only fade over time.
I quite agree with many people in forums who say a more mature attitude is needed, and this is certainly true. We know that if we don't approach this maturely, we will inevitably become trapped in a cycle of gambling that creates false shadows without realizing that they are in business for profit, and we are destined to lose from the start.
I am not sure that casino owners goal is to make gambler lose. If gambler lose everything, they will never return. Its the same as saying that every business goal is to take money and dont provide any good or service, or saying that medicine is created not to cure, but to keep people half sick/half cure. You said it yourself, gambling is game of chance, casinos also risk their money when they let gamblers play. People lose a lot of money not because casinos a made so, but because they are greedy.