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You are right people can get aggressive if they lose in gaming and if they will start drinking alchohal it will be fully bad for them not only mentally but physically alcohol is ingerious to health so better keep calm and not let gambling affect you emotionally better if you stay calm and gamble with small amount of money that you can afford to lose but gamble in limitted time and with limited amount of money.
It's drinking alcohol is what makes them aggressive, not the fact that they are losing(that's a different story). It's much harder for people to control themselves being under influence of alcohol, even if they are able of doing it otherwise.
The influence of alcohol is certainly very heavy because the more you drink, the more aggressive you cannot control in any case, including gambling, but the stubborn one is always accompanied by alcohol to play gambling because it has become a habit but that I feel is not the best thing but it becomes worse when playing gambling because their control will be lost to lose a lot of money in gambling they play.
I don't think if playing gambling with alcohol will make it calmer.