I know of someone who is so addicted in gambling.who spend his time and all his money in gambling.
Which he is finding difficult to stop or control, irrespective of the consequences that surrounds it, such as relationship issues,lack of finance and emotional breakdown,many people go through so many risks just to be able to fund that lifestyle and majority of them are using gambling as there day to day activities (they make it their job) this set of people or person can loss friends, family and relationship.
Because all there focuses are on gambling, when you come across this kind of people. "all you need is to counsel them" because it's beneficial
I know many addicted gamblers, and no matter how much advice we give them, it won't work. Because when gamblers are addicted, their only concern is how to get money to gamble and recoup their previous losses. Especially if your friend has been shunned by family and friends, and has lost all their money, their only concern is to continue gambling until their finances are back to normal.
So, no matter what advice we give, they won't listen. One way to treat addicted gamblers is rehabilitation and consultation with a psychologist to change their mindset. Unless their addiction is still mild, advice might be helpful. But if they're already addicted, like your friend, rehabilitation will be the best medicine.
Your friend's only mistake is that they view gambling as a source of income, not entertainment.