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I have told him to focus on online gambling but he told me that he is more entertained in physical bet shops.
~Snip
If it has become a habit and the place is his favorite place to gamble, it is natural for him to insist on continuing to gamble there, even though he is sick. Because gambling online and gambling in the real world (offline) do have differences in terms of enjoyment. Because if you gamble offline, of course in that place you will meet your friends, laugh together and eat and drink together. So there is definitely a very strong sense of togetherness when gambling offline.
But if are in a sick position like your friend, then it is not recommended to gamble in a crowd. Moreover, your friend has a disease that can be contagious, this will certainly endanger himself and other people if your friend is stubborn about gambling offline (in crowded places).
So the right solution for your friend is, in essence, just have to gamble online. Because instead of endangering yourself and others, it is better to stay at home until your friend illness is completely cured. Because playing gambling online is no less exciting. In fact, currently there are many interesting game choices on online gambling sites that can play, so the point is that won't get bored quickly. Maybe the downside is just not having anyone to chat with, but I'm sure this can be overcome if find a game on a gambling site that is really exciting. Therefore, try offering your friends a very interesting gambling site. Who knows, your friend has never tried online gambling, so he thinks that online gambling is very boring, even though in reality it isn't. Because it would be very worrying if your friend gambled in a crowded place, even though his body was sick.