We must always care about the risk especially with both financial and mental as gambling can really harm us in both ways, getting emotional will just lead you in losing a lot, better to set your balance and limit to whatever amount that you are comfortable to let go, with that kind of setup it lessen the worries in case the outcome won't turn into your favor.
Every people can be emotional when they lose their money in gambling and that is normal feeling but if we can hold ourselves not to become emotional, that will prevents us to lose control of ourselves. In gambling, we must have ability to prevent the lose control especially if we already see many people gets that feeling. When we become emotional, we will not remember that playing gambling is for fun instead will recover our losses without thinks that we already used too much money before. We can not breath normally because the tension will also become high so we will forget about our rule because we want to chase the winning in the gambling. That is why we must manage our money in gambling so we don't have to lose big money which can lead us to lose control and become emotional.
That's true when you already out of control everything start to fall a part, instead of playing with fun eveyrhing change and you start chasing your money especially if you are not ready or willing to let go, it's more likely to lose more if you got emotional as you will keep adding more money when you suffer with losing streak, the tension and fear always intimidate you and lead you to make a mistake deciding what will be better for your sessions.