In my country, there are billboards running gambling Ads and in the end they always say "gamble responsible". I am a little bit surprise, you haven't come across this in your own locality. Its almost everywhere.
Drinking is way dangerous than gambling too, so if people running Ads priorities responsible drinking to responsible gambling then we know the reasons why. Because of drinking many lives has been lost.
Same thoughts as mine, gambling ads are everywhere perhaps he doesn't go out much or doesn't make use of gambling sites to actually come across them. Gambling has a different mental effect from drinking but they are both deadly. Gambling addiction can lead to a lot of self destruction that may result to suicide and excessive alcohol consumption can affect your organs which may lead to death, so they are both dangerous