I beg to differ as gamblers are basically addicts who have a tendency to lie. In regards to their downfall as an addict they would find another lie to reason their downfall. I have been comparing gambling addicts with alcohol addicts ans you would find the same behaviour. To an extent that these two addiction are more so similar with their addiction habit. They both hide their addiction, they hide themselves when they are satisfying their addiction. The steal money and they would kill anyone to satisfy themselves. Getting addicted is so bad that they even destroy their families reputation and the bond that holds the family together.
This is the dark and worst side of being a gambling addict. It's hard to acknowledge these, but it's the truth. Most often, those who are addicted to their vices do the vilest things just to satisfy and fulfill their desire. Moral compass is no longer on the table for them the moment they want to achieve something. It's harsh, but it's the reality. When these people no longer prioritize their needs and no longer cares about their surroundings, things will get chaotic even more for them and for the people around them.
Hence, medical intervention is needed in order to combat gambling addiction. If there would be no proper move to resolve it, it will just worsen and God knows what will happen next. Self-destruction is one thing, and perhaps they can go low as you mentioned like destroying their loved ones lives or doing illegal stuff just to be able to gamble.
You are correct, of course, when it comes to the negative consequences of gambling addiction. This beast has the ability to devour lives. But let's not delude ourselves: vices have always been a part of the human experience, have they not? Every civilisation has its share of diversion and intoxicants.
Ethics compass? Come on, it has always been pliable. Today's "moral" might not be tomorrow's. Like everyone else, gamblers are simply creatures of evolution, with a natural desire for gain. And if they go beyond bounds? That's just the character of humanity reflected in that.
medical assistance? It is, indeed, a patch. The true problem, though, is innate in us. Regarding the statement "God knows what will happen next," history has repeatedly demonstrated that mankind is its own worst enemy. Thus, rather than blaming gamblers alone, examine society as a whole.