Game is a sports and gambling is a kind of game. You know we always use word play the gambling, its mean gambling is a game, we never say do the gambling. Because it is not a job or business, gambling is pure game, and nothing else. But in gambling we use money that's why we all are greedy with this game of gambling.
I'm not sure if the game is a sport. But I strongly agree if gambling is one type of game. Because gambling is a game. But if only the game, we do not need money to play, and for gambling we need money to play. And I also agree that gambling was not a job or business. Because gambling is just like what you say, gambling is pure game.
Mostly, when we played a game, our main purpose isnt related to money while at gambling, money is a must. We cant call an activity as gambling when there is no money involved.
Yes, you say is true, very true, absolutely true. All of the game, any game, if you put your money to get more called gambling. Very all types of games, even if you're just playing FIFA / PES in your house, with your friends, if you put up the money for it, the person who wins will get the money as well, including gambling. Gambling was common, nothing in this world can be used as gambling. But the game FIFA / PES you will become a regular game if you do not put any stake.