Defeat is something that is guaranteed and no gambler can avoid it, defeat is an outcome that all gamblers must accept as much as possible.
It is true that in every game we will have wins and losses and we cannot avoid this. If we don't want big losses, of course we have to be able to control ourselves in every game we play.
True, the risks involved in gambling cannot always be avoided, sometimes even people who have strict limits will still experience losses like professional gamblers, but maybe for those who have control and limits they will not suffer too much defeat.