The greatest vulnerability of the past is that they enter a casino and steal all the funds and then the casino has the capacity to respond to each of the players, all the casinos are in danger of that, but if a very large robbery occurs What casinos can be here to respond to that? It is known that a vulnerability is a failure of a casino, but players do not have to pay for that failure or bug.
It will always be 100% the liability of the casino if there are some hacks or some theft on the balances of the casino. Sometimes though, if there are irregularities on the account activity, they can use that as a defense to not shoulder the lost funds of the player. But oftentimes, it is the casino that is liable for these kinds of things.
Perhaps that was in it's infancy, wherein casino's are very vulnerable and maybe they don't have cold wallet and everything is in they hot wallet that's why hackers can get all their money. But security has involved already, and so far vulnerabilities are like people abusing the casino or even some exploits. But it can be quickly patch by the casino if they found out and that individual ban from them. Sometimes though, those exploits turns into a bug bounty for the gamblers.
This should never be an excuse that the casino should put put if they're hacked. Their top priority should be security then the quality of their games. I wouldn't trust a platform that states that their security is on its 'infancy' as that is just taking the easy way out on taking responsibility of the matter.