Nowadays, maybe not so much, but in the past, there were a lot more online casinos that weren't provably fair. So, it wasn't just the house's advantage but there's always the chance that casino could screw you out of a good hand if they wanted to. And no one would ever be the wiser about it. You wouldn't know if they were doing something that would tip the odds in their favor.
We will never know what happens behind the scenes but we will definitely lose for anything that will bet on gambling but not for consecutive/instant losses, I am not directing you to assume "manipulation" or "cheated" due to the fact that I do not dissect the source of gambling games and cannot measure the chances of winning in each bet. But every game update, the team will update/improve the game source and hope the team is committed to fair play for gamblers.