Casinos will always need to hire people, because I doubt members of the staff of a casinos are willing to trust their treasury, their security and their advertisement to a machine.
Well, I think casinos will end up firing staff and replace them with AI. All in an attempt to reduce costs and make more money. If tech companies are laying off thousands of workers due to AI, what makes you think casinos won't? Especially online casinos. The future of gambling is here, and it will happen whenever we like it or not.
My guess is that besides AI, stablecoins and Quantum Computers will radically transform the gambling industry. Probably, there won't be a need for physical casinos as everything will shift towards the digital realm. This is just my prediction. Nothing is set in stone, so anything can happen in the long run.