If I quit gambling because of losing the money and the loss is not too much, I am a smart bettor because if someone can not minimize their losses effectively, he may lose too much money. He must stop gambling instead recover his losses because that can make him losses more money. Losing some money will be okay but if the losses become big and we also lose control, that will not be okay. We will not become smart bettors because we don't know what will happen next and that will add more losses.
It is your choice to stay or to leave gambling. If you can't manage your money and you have no self-control, gambling isn't the right place for you. Gambling is only for people who understand to manage money and have the mature mentality.
If you're afraid to lose huge money, you naturally use small money only. It is always not recommended to use big money, unless you're professional or experienced gamblers. Even those professional gamblers, I'm sure they won't use big money for any gambling game, they must choose certain games. For the luck-based games, using big money is a big mistake. Smart bettor will never use big money for too risky games.