It is easier said than done. I cannot say that we can totally excuse and keep gambling away because addiction does not come to a person out of nowhere. It is the gambling itself that made the person addicted.
As the saying goes, it takes two to tango. We cannot say leave the dope alone, it is the person who should try to control himself, right? You cannot say you can't partly blame that thing which caused the addiction itself in the first place.
You can't blame a "thing" for you becoming something wrong or doing something wrong. A knife is perfectly harmless if handled by an innocent person or some kind of cook, but even a pen can be a lethal weapon when held by someone trained. Gambling is just a form of entertainment, a game of sorts. It isn't some kind of entity that forces you to follow it and spread evil stuff and things like that.
As I have said, it takes two to tango. You cannot totally blame gambling but you cannot also excuse it or totally dismiss it as having no part in whatever illness or disease that is developed in a gambler.
Gambling is not "just a form of entertainment." The reason why gambling is strictly regulated in so many countries or even banned in some is not because they don't trust their citizens or their sense of control and discipline. The reason is that gambling is dangerous to a certain extent. You and I may not agree but it is even considered evil to some.