And we have not even talked about the fact that most addicted alcoholics are also gamblers as well, I don't know if it's the same in other cities but over here in my city, it's hard to come across a person who is addicted to alcohol that is not a gambler, so lets just say that gambling is something that goes hand in hand with drinking alcohol.
Casino ads are every where like you said though in some countries where gambling is banned, casino ads may be limited which is very understandable, but for other countries where both gambling and alcohol intake are legal, casino ads are seen as much as alcohol ads are seen.
It's true, these two often go hand in hand. However, what the OP is describing is basic common sense, one is clear endangerment not only to yourself, but others, while gambling is about yourself (but usually also involves others but that's another story). According to an article I read on ScienceDirect, alcoholics are at a much greater risk of developing a gambling disorder. This is due to the effect these addictions/behaviours have to the brain, activating similar "rewards" that lead to compulsive behaviours. Alcohol soothes you, while gambling on the other hand provides an adrenaline rush, feelings that someone who's mentally unwell crave.