This won't help mate as most of the people here will have an expected feed back. Although we already know that there's benefit in gambling but otherwise we don't have the same feathers.
"Gambling is not good" , "gambling is harmful" etc.
No doubt gambling is bad, gambling is harmful and there are many bad effects of gambling on the whole. Gambling is beneficial for those who are experts and they know the tricks to win the bet. They can make big money in seconds, while other who has no or very little experience of gambling can lose all their money. Gambling is good only for experts.
I also believe this is true, but the problem is gambling is a form of competition, and humans will always be competitive. Whilst there is one human who thinks he is better than another, a gambling type circumstance will always form. e.g. I bet you I can do this, and you can't. It's only natural that systems form around this trait to make it easier to wager.
I would actually call it greed rather than competition most of the time. It would have been classified as competition if it is a real game that you are playing with others, and in that case, at least, we can say you are competing, but for game you are betting against the house and you have more chances of losing than winning, I cannot classify that as competition in anyway and anyone who ends up not controlling himself or herself and ends up losing so much as a result of addiction just got greedy at some point.