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For those who make gambling to make money, this is a very ridiculous thing and this will be very detrimental for them, they can even spend all their assets on gambling. I agree with you if we think of gambling as a place to seek entertainment, this will benefit us if we experience victory and we can accept it if we experience defeat.
In fact, if managed properly and correctly, people who gamble can earn money and that can be additional income for them. But what's wrong is when gamblers focus too much on their gambling activities and leave other things, even to the point of selling the assets they have just for gambling. If someone has reached this point, his life has been ruined because of gambling.
And because of this a gambler must have good mentality and psychology in order to be able to balance his life and his gambling activities, so that it will not harm him and those around him.