There's a country where gambling is illegal, if someone want to gamble, they will try in a safe place because it's sensitive. This will make people encouraged to not gamble in front of their kids.
There's a country where gambling is legal, moreover if they're liberals, so any people including kids can choose what they want to do and what they want to be.
And it is true that some countries have regulations against gambling, but it is not certain that all people there will completely stay away from gambling activities because the gambling industry will always have fans who come from any country, even if it is country that prohibits gambling.
There will be various ways to avoid or hide traces of gambling so that it is not known by the government or legal authorities in that country.
Usually gamblers when gambling online will change their IP address by using VPN.
And if they gamble physically, they will gamble in remote places which are not easy to find if there is gambling activity there.
Moreover, every country will have various areas which are divided quite lot and in certain areas there will always be special places which are really guarded to be able to carry out various illegal activities or activities which are prohibited by the state, in this case there is sufficient circulation of money. large so that it does not rule out the possibility of bribery for protection.
However, gambling in front of children is not recommended even though the country has permit for gambling, this will create curious attitude for child to engage in gambling activities even if it is just trying.
It is not matter of licensing in country and the habits of adults but of disrupting the growth and development of child brain and skills, it is clear that gambling will affect all of that.