There are many companies that have got hacked and are still in progress today because they have a good brand. Getting hacked should not be the end of the road for companies that have the ambition to be at the top of the market. There are so many casinos that have got hacked and are still in existence till now because they have a strong team and backups that can withstand such an attack that could lead to bankruptcy. Gamblers are motivated to keep using a casino that have been hacked before and still standing strong providing adequate services to users
Well it is not normal for a casino to get hacked, at least the casino should not take it lightly as there is some security flaw in the design of the casino that resulted in such hack. They should take every possible step as how to avoid this security breach, increase their security, keep them money in a cold wallet and also keep the KYC data of the users on a secure server. Even if the casino is strong enough to resume the activities after the hack, it creates doubt in the mind of the people if they should continue use that casino and if anything similar or severe may happen again

You are right, absolutely right, it is commonly said in my place that "one doesn't get rich through getting and throwing it away", this simply means that, a man will not become rich by hustling to make money, only to later on allow thieves to steal the money, or he himself spend the money unwisely..
Every hack should be properly and thoroughly investigated regardless of how wealthy or rich the company is, and how insignificant that the money stolen from the hack seems to be, a lost is a lost afterall, and no matter how small or insignificant the money stolen is, it still can solve a problem or two in the company, or perhaps, pay the salary of few workers in the company if not all..
Though like I will always say that most hacks happen because of untrustworthy parties inside the company, so companies should always ensure that their worker can be trusted, specially the developers of the product of the company.