I think it depends on each individual. If they are really ignorant people, maybe they will do what they like as long as it doesn't harm other people, they will still do it, but if you gamble in a public place, it can be seen from the country that allows or does not allow gambling, if in that country gambling is not allowed. but they gamble openly as you said, maybe they are ready for the risks related to the law, or maybe they are not afraid of what will happen next.
I would be embarrassed if other people knew about the gambling activities I was doing, even if it was a win. because in my country gambling is prohibited, but that is not an obstacle or barrier, the proof is that there are still many people who gamble online, some even do it while broadcasting live because they want to increase their income from the many people who watch it, and there have been no cases of arrests. fast with those who gamble by broadcasting live broadcasts. Everyone has different thoughts, therefore we can do whatever we want, but the note is that what we do should not harm other people. that's what you have to remember.
Gambling in a country where it is illegal, or when a person is underaged is one thing. The other thing is when gambling is legal, you are free to do it whenever or wherever you want. In general you do nothing bad. But, some people still want to keep it in secret. I would understand if you win millions and want to hide that fact from family or dont want to pay taxes. But there are people who gamble, lets say once a month. They place $10, while they earn several thousands monthly. And they hide fact of gambling. Why do they do that?
Indeed, everyone can do whatever they like, even though it may be against the law, but if they like it then they will probably still do it. and even though gambling is prohibited in their country, if they are addicted then it is very likely that they will do it secretly, because it is their hobby so they will definitely do it even though it is against the law. and even so, there are some of them who keep it a secret and there are also those who publish it.
Personally, in my opinion, it is best to keep the gambling we do as a secret, even though it is permitted in the country, but in my opinion it will only waste money and of course, in that way, there is a possibility that small, potentially big problems could arise. It is also better to keep the winnings obtained in gambling a secret, keep quiet and enjoy it in a good way, it is okay to treat a friend and tell them where the winnings came from, as long as our friend can fully understand, so that no conflict will occur.