Yep, you'll master emotional control if you have a lot of experiences in gambling. Sometimes it's because of yourself you're managing to survive such things and controlling emotions in difficult situations is because of your journey in gambling. It's slow, personal, and full of trial and errors in gambling. Watching others and learning from shared stories can give you insights how to manage things, but IMO, the best way to learn is to feel everything by yourself. Don't get me wrong, taking advice from other people is a good thing too but to become a consistent and disciplined gambler, you need to learn it by yourself.
True when it comes to controlling emotions older and more experienced gamblers control their emotions much better than new gambler's who is just starting to gamble because they know that gambling is just a game that so they don't get their emotions attached to it because with time they have been able to know and learn that gambling is one thing that you can't trust because there's nothing sure about it so attaching your emotions to it is doing your self more harm