i think it has to do with how societies look at alcohol and gambling. if you think about it, the maximum damage that someone who is addicted to gambling can do to their life is much more than someone who is addicted to alcohol. so with alcohol the most you can do is get carried away, but eventually your life goes back to normal. that's why alcohol is much more innocent than gambling. someone who starts gambling can have a very bad impact on their daily life, their finances and everything else. irreversible financial damage is definitely worse than walking around drunk one night. so i think that's why.
If it's just going drunk for one night or two it's better but I can tell you for a fact that alcohol has destroyed the life of some people, maybe not in your place but in my locality, when I was growing up, there was these few men I know there were very rich but alcohol addiction made the poor and useless. One of them lost his job because of being drunk all the time, one lost his business because he could not manage it again.
Gambling and alcohol share one similarity, both can be addictive. If not controlled properly, they can lead people down a path of destruction. There are many examples of this all around us, and we can easily find more in various media. In my opinion, alcohol destructive power is greater in the long run because it intoxicates and impairs a person common sense. Someone who is drunk finds it difficult to control their emotions. While with gambling, even if a person acts excessively, they typically do not lose their sanity, which allows them to realize their mistakes more quickly. However, this does not mean that one is better than the other.