It’s a weak reason to that since hacking is a crime which means their reputation might be dragged too once the hacker caught or blackmail them for being the master mind on the hack to other casino.
They will just focus on marketing to beat their competitors rather than resort to hacking that there’s no guarantee that they will successfully penetrate other casino security.
Besides, they just need to focus on their own business if they want to become successful since there’s a lot of competitors that is almost impossible to hack them all at one go.
I suppose that the concept of casinos recruiting hackers would make quite an unrealistic turn since the risk is far too exorbitant. Once they are busted, the reputation that they have built may suffer even more than the loss of a few customers to competition. Confidence is key in this industry and when it is lost, it will be near impossible to regain. In a bid to avoid such risky shortcuts, most successful casinos concentrate on enhancing their games, providing better promotions and ways on how to make players happy. It is a stiff competition, nevertheless it is only smarter to develop your own brand rather than attempt to ruin the others.