A gambler can also continue gambling even at loss because he is having fun and have not exceed his gambling budget, he will keep on gambling.
You are right, bro. Those gamblers that still continue gambling after losing so much do not realize that the gambling system is designed in such a way a way that it only favors the casino greatly while the gamblers are primarily the ones at loss. It's necessary for a gambler to only stake with the money they are ready to gamble off, so that once they lose all that money to the casino, they can just stop and go back home. If I want to gamble, I usually deposit the amount I want to gamble off, and if I have also won a good amount, I will just withdraw a specific amount from my winnings so that I don't end up losing it all too.
That is why casinos are growing because the system works effectively which favors their business. However, this won't mean that gambling is bad because it still depends on the gambler's behavior. In fact, there is a warning given to all gamblers "Gamble responsibly" but what really happens is that more gamblers become irresponsible. This happens because they can't control themselves and instead of making gambling as a sort of entertainment, they now consider it as other sources of income.