Yes, gambling is your choice whether you work there or not. I've seen a friend who runs a gambling shop as a manager but avoided gambling most time. He had full control over the activity and wagered a very small amount if he wanted to gamble. Is that not a human being too? It's all about how we can show restraint no matter how it comes calling. We should think about our lives and welfare first and that of those who are close to us. That money is too little to waste like that.
There is no big deal to discuss here other than for the gambler to face the reality of gambling, it's not where to get the riches they desire. It's either he continues and becomes miserable or he avoids gambling and takes his salary home for survival. If at all he must gamble, a very low amount is enough for it, it's greed and desperation that push most people into uncontrollable gambling and I blame them.