"sorry but I have my opinions based on first hand and you have read a book."
Your opinions are fine, as long as you appreciate that they are based on one personal experience, and cannot possibly be taken as evidence of a general trend.
There's not a lot of point in trying to have these discussions (which are about very important issues) if someone can't appreciate the difference between anecdote and fact. Your personal experience of a case of alcoholism is interesting, and has obviously been a powerful one as far as forming your views on the subject go, but please try to grasp the point being made - that your opinion is not based on statistical evidence.
Saying "I'll leave this topic to the experts" isn't much of a way to handle it, but it's your choice. As far as I'm aware there are no experts on gambling or alcoholism in the forum. We're all just expressing opinions, but some are based on research; others are not.