I think gambling is a game that's why it has a bet and you losses somehow but playing games like LoL, Dota etc. it kind a weird like sitting and earning, there's no word loss and enjoying at the same time.
Yes that is right that gambling games are the way through which we can make money, but the amount of money that we can make through gamb lin gis to much risky as there are more chances that you will lose your money in gambling.