My sister has been working in a casino for 7 years, and she doesn't gamble. It doesn't interest her at all, she didn't gamble before that, and she doesn't even after all those years of working in a casino. It's a character after all... someone has a strong character and is not interested in gambling, so even working in a casino with all those games, people winning and losing large amounts of money, won't influence someone to change that about themselves.

But when it comes to me, I doubt that I could stand to work in a casino and not make at least a bet or two on some games... but I am degen. I simply couldn't watch others having fun without joining.

If there is any conclusion at all, it is that there are different people, and until someone finds himself in a certain situation, we cannot say how they would react and what they would do. Even if the casino has a policy that employees can't gamble, some of us would try to get around it... and probably get fired from that job.