I know the reason why people hide their gambling activities since its either their environment where they currently belong doesn't accept this activity and take this as heavy sin or they don't want to influence other people to gamble to since they just want to face to consequences of all the actions done so people choose to hide their activity and don't tell this to anyone.
But if everything is open in their side and no people will criticize them towards the decision then also the activity they choose for sure gambler will not hide their activity since nobody like to sneak just to gamble since its stressful for hiding our activities since we don't want to be seen by those people who is not open minded on gambling activities and its consequences.
because indeed some people and the majority of society have a bad view of gambling so they are not happy with people who gamble or with the gambling activities they do. Also in my opinion, they have a bad view of gambling because there have been many cases of gambling addiction that have destroyed their lives, it's just that they might think that what made their lives ruined was gambling, whereas it was the fault of each individual who responded wrongly. gambling so that they gamble beyond normal limits.
In fact, gambling is not bad if we can do it within reasonable limits, don't do it excessively, like being very obsessed with winning, of course that's not right, because it will only cause them to experience big problems in the future. with those who hide their gambling activities, maybe because they don't want other people to know that they are gambling, because there will be bad views and maybe even words that are not pleasing to the heart, but in my opinion, if you want to gamble, it's best to do it in secret, because by doing it in secret. Frankly, it doesn't bring any benefits, in fact it might just invite conflict.