If you were the casino manager would you fire the casino worker for interfering with your business or would you ban the gambler from visiting the casino?
No. Although, I don't think my moral compass would allow me to even operate a casino in the first place. At the end of the day, casinos claim to care about their customers, and that's why you see all these adverts about being responsible, and having features which limit the amount you can spend, but the thing is they're too easily removed, it usually only takes 24 hours.
They don't actually care all that much about the customer, they care about looking ethical, and basically use it as a PR trick. Now, I'm not saying every casino is like this, because they clearly aren't. However, the vast majority, and particularly physical location ones, literally pray on their customers by offering them suites, and benefits if they gamble over a certain amount, and most importantly lose.
I can tell you now, if it was someone I cared about, throwing their money, and their life away, I'd absolutely be willing to lose my job over it. Family is more important. Even, if it wasn't family like the example given, if I heard they had a new child, a wife, and all of that malarkey I'd absolutely have a talk with them. There's more important things in life, than profit.