The ability to control emotions is good to minimize the possible bad effect of gambling but it will not help us to have bigger chance to make money from gambling. There is no guarantee in gambling, whoever we are, how patient we are, how good our emotion control, how good our bankroll because Luck does not care about all these things. No body knows when the luck come, to whom the luck come, and how the luck come because it is like a mystery that we will never able to predict.
Controlling emotions can save us from big losses and it may also help us to hold our winning but if we loss control of our emotions then we may fall into big loss and may not gather any earnings from gambling that's why controlling emotions is very important for us.
One thing that gamblers actually have to prepare before gambling is being able to control their emotions. If you can't do that, it's best not to gamble because it will have a bad impact on the gambling that will be done. I'm not the type of person who likes to gamble directly. Usually I prepare a budget and prepare myself whether I can control my emotions or not, if my condition is not in a good mood then I will not gamble because it will make me lose later because I get carried away by my emotions so easily.
The point is, don't ever gamble suddenly, always make sure that when you want to gamble, you have a good feeling because it can make it easier for you to control your emotions and also be self-aware in setting your gambling budget so you don't exceed the limit, at least know when to gamble and when to stop playing. gambling, because if a gambler can do that he can be said to be a true gambler because basically he knows how to gamble well without having to think about pursuing wealth from gambling which is actually impossible to obtain. even though gambling is actually just entertainment.