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.
Yeah this is what's gonna happen and its bad for their business if they don't have any returning clients.
So what they usually do is they create a provably fair platform for their user so that they could give their gambler at least good chance to win in their casino.
This is why usually a casino especially those reputable casinos promote a provably fair system so that they can attract lots of clients to gamble in their casino. There are times that casino also lose and we could see it when they announce that there are some players win big profits from their casino.