People gamble not just for entertainment because of the chance to win big money. It is entertaining because it gives you excitement even if you lose in the end.
I agree with you, gambling get people excited to earn some money at the end of the game, I think people like taking a risk due to gambling.
Actually playing games online also can make people excited, like some people compete on a tournament with a big prize.
But if I will be having a chance to choose from Gambling and Online Games with a great prize, I would rather choose Online games since I know that I will be competing in such game because I have a skill to it. Saying that, I can say that I have a higher chance of winning that certain big prize on Online game than on risking my money on Gambling.
There's one certain mistake you guys are making on this thread cause you seems not to understand that any play games of chance for money which money is involved is also gambling. Although, playing games will make things lifely by bring more funs and excitement to the player.
If I get something against my money I will be happy but if nothing then obviously I will feel disappointment. The same is here in gambling. Some people say that they are gambling not for making money but for fun and entertainment. If I go for a long drive with my family or friends I spend lot of money I will be happy because I enjoy the trip but gambling is something different.