Those who are later looking for help and fighting gambling addiction are certainly at fault, it's from the beginning that they should have avoided that to avoid wasting themselves and their finances away. Many would not learn about gambling but just dabble into it, they never knew how it is being engaged wisely, the dos and don'ts of a good gambler and many more, but will just start because they believe they could try their luck since it is easily accessible, but instead, they start losing and exhibiting a very bad behaviour regarding it. Well, it is never too late for anyone and every gambler could be healed whether they want it or not, that is why they need more external help if they can't help themselves.
And yes, it will be nicer, easier and quicker if the gambler has the Willpower in them, it may even make them heal all by themselves, but when they cannot after trying many times, external help is the key. This may start with their friend, family and loved ones, before moving to the expert level if such close external help does not work. And if it's the experts in the field of psychological healing like psychologists, psychiatrists and therapists, they can unlock the Willpower that you guys think is impossible, so that the gambler can control his consciousness and fight within as well. That is the first goal of all experts even if the gambler or the addict seems uncooperative and unwilling to be cured.
I don't think anyone would willingly get themselves in trouble, so those who get into gambling don't realize that they are going to get addicted to it and then become reckless gamblers spending so much time and money on it. Most people just want to try their luck with gambling in the beginning with a small amount, but they don't stop right there when they lose that money, they keep trying so that they might win something at some point, and eventually get addicted to it.
Then there comes a time when they don't gamble only for the gains but they do it because they can't be without it, though they also want to win some money but the addiction is barely for that because I have seen gambling addicts winning in gambling and not stopping but trying to win more after that.