That's true, success stories are shared much than the losing history. Whether we are into gambling or we try to follow any of the gambler, it is our responsibility to have prior plans as well as set our limits. The same luck of the one who has succeeded out of gambling won't be with us, so we are supposed to have our own strategies and tricks to increase the winning probabilities. Moreover the right exit strategy could get you small profit.
You can only set your limits if you have a discipline though, addicts tend to not be able to control their urges to do the things that they are addicted. Yes you are right that we won't have the same luck as anyone but I don't think that strategies won't work in a game of chances, dice will land wherever it wants to land, no matter how good you are with tossing the dice, you won't be able to control the outcome once it is out of your hands.
I am following what you wrote. Having a strong discipline and the ability to control ourselves will be the things that every gambler must have before playing gambling. No matter how good your strategy, if you do not have those two things, I am afraid that you will end up losing your money. So before you use too much money to play gambling, you need to reflect yourself, is that money really worth being used for playing gambling, or just need to use a small amount of money to playing gambling.