When a gambler is addicted, the fun in gambling will no longer be there. This is because he will always be thinking of chasing his losses, as he is now gambling to recover his loss and not for fun. Gambling will bring pain and regret to such addicted gambler, because he must have used funds for important purpose to gamble which will affect him negatively. This is why it is good that we discipline ourselves, and only gamble to entertain ourselves so that we can enjoy the fun in it. Losing or winning should not be what we are after, but how to gamble and live a healthy life is what we should consider as gamblers.
I agree with you on one part, and on the other, I disagree with you, because most people who are addicted to gambling, if you ask some of them, will tell you that they are not addicted, nor are they chasing losses; instead, it's the fun of the gambling that's dragging them to the game.
But we all know that if someone is addicted to the game, he is no longer in control of himself, and even if he is having fun, those fun's are no longer of any good use or need; too much of everything is bad, and why they claim they are having fun, they are wasting the time that they could have been using for other things like gambling and also the funds that could have been put to good use.