I don't want to lose money either as you. But I don't think that what I lose in the gambling games will make me so sad because I know the risk that when I play gambling, I am willing to spend some money because I have a chance to get the loss.
I think there are many other disadvantages of gambling, but we don't know details because we only know that the big disadvantages of gambling are losing the money.
Every coin has two sides and there might be both advantages and disadvantages of gambling. This multi billion dollar industry has been very hard at some people depriving them of their money completely. The risk is high and probability and LUCK speaks about who wins and looses so I think one should find other adventures to make money and not really rely on gambling. Gamble only when you enjoy it and are ready to loose some dollars.
The one that OP mention is true and gambling is one the most addictive activity, if you can't control yourself in gambling then it will destroy yourself and your life, it can destroy your mental and affected your social life
This cannot be disadvantage of gambling but a pure consequences of gambling in negative side. When we gamble responsibly we can simply overcome this negative consequences. But, practically gambling will never allow us to gamble with consciousness. Because, the trills of gambling will take us into the state of excitements where no one is able to realize themselves too.