You are right but humans can not be 100% discipline that's why most times disciplined gamblers also fall into temptations. But even if one can be tempted by money through loss chasing at least they should try to control it. If chasing loss becomes a habit it's very important to take a brake on gamble rather than continue then lose more everyday. Gamble only becomes interesting when gambling responsibly. Risking the amount you can afford to lose will help a gambler not to become greedy and chase after losses.
Yes, but it doesn't matter, because there comes a time when discipline becomes a habit, I say this because it happens to me and if one tries to break that discipline one feels bad, that's how it is with diets, well I say diets of eating healthy, without sugar , bad fats or something like that, we are always going to look for the best things for our being and more so when it comes to money, the reason why that discipline goes away is that the effects of alcohol can do it, or extraordinary things, but it is rare for that to happen.
Yeah, it's rare to practice it but there are few or some gamblers who already gained their experienced they managed to keep that control and played with a discipline ways to avoid losing a lot, your set example is valid as there are factors that really breaking in your way but if the dedication and that self-will really focus into something that will benefits you, once you acquire the high level of it then it surely do the best for you.