Everything boils down to emotion and greed some people do not know how to control their emotion and they don't also know how to control their greed. When they are in for it, there is absolutely nothing you can say unless they exhaust all the money on them before they will listen to you.
There is nothing wrong with gambling if it is done like a fun and not when the gambler uses all he has to do bet a particular game and which eventually when the outcome does not favour the gambler he will loose everything and plunge into emotional damage.
That's the story of almost every addicted gambler, they know no stopping until they have nothing left to gamble, and even then, they try to find a way to get more money only to continue gambling because the urge just doesn't leave their mind and keeps tickling and telling them that they will now win something big if they play just a little bit more, and that little bit more keeps getting stretched until they lose everything they've gathered once again.
Most people don't gamble for fun but they do it to earn money so that they don't need to work, I consider addicted gamblers lazy people because they want to use gambling as an excuse to not work to earn money and they want to earn a living through it which isn't possible.
I agree gambling addiction always leads to losses and it can never be a way of earning. Those who choose it as a means of earning a living are at risk because there is no guarantee of winnings in gambling, it depends entirely on luck. A lazy person can do nothing in life like any other hobby related to gambling, there are some problems and weekly people suffering from addiction lose huge amount of money, face financial problems, get into debt and can't stop betting in online casinos.