Winning is secondary when it comes to success stories because that can be achieved by anyone. The most difficult thing is overcoming gambling addiction and self improvement. People only get interested in stories that have to do with gamblers winning huge amounts of money forgetting that those wins can still be lost in a day.
I admit that winning sometimes isn't the priority for some gamblers. Those gamblers who gamble for fun only, they are more focused on enjoying the games. They know when they decide to play the gambling games, it means they are ready for spending money. However, I believe everyone can't deny that when winning the games, it will be more fun.
Well, to deal with the addiction, gamblers need to be disciplined. Gamblers must stick with their plans, they don't try to gambler excessively. If they can do this, I think they can avoid addictions. Regarding the "self improvement", what do you refer to? If gamblers should improve their knowledge to win the games, I'm sure this is something impossible since gambling mostly relies on the luck.
By the way, it is very true that we can't avoid losses. Even though we can win in a row today surely it is very possible to lose in a row in the next days. However, we can avoid severe losses if we can stick with our gambling plans. That's why we must have a certain allocation for gambling, we don't try to break the limits.