Zdad,
What a ridiculous comparison.
This is not about a “ban” (I know you love that word)on casinos. They were illegal thus far. It is legalizing something that was not legal to date, even though it is known to have deleterious effects on individuals and communities. It would be comparable to legalizing cocaine or heroin.
This difference is not even in the least bit subtle. You should be able to comprehend it.
And FYI, there is nothing wrong with getting drunk on Purim, it is in fact a halacha to do so.
But I suppose you believe you know better than the shulchan oruch.