Its hard to determine how people actually become addicted. Some way its usually beginners luck which gets people addicted, where they win a large sum of money, and they find it easy and decide to do it again and find it difficult. And they keep trying over and over and it gets out of hand.
Others say its due to people not being able to control their emotions. Which is what we find in dice or trading stocks. People take a bet or trade and when they win a small amount they are happy. But when they lose, they say they will keep playing until break-even. And eventually their trades or bets are very large and what was once a small loss ends up blowing up their entire accounts. And this is why it becomes addictive to those individuals.
The determinants to how people fall into gambling addiction is not specific and it makes this that you have expatiates on one of many varied paths to addiction. To the newbies the beginners luck that should be a infrequent experience that should be celebrated by the newbie gambler instead became the beginning of his horror with gamble.
While emotions is inevitable to experience in life it will be handy for a gambler should they learn to master a control over it instead of the opposite. Thier is no hurry in making money from gamble, when it is your time you won't have to play over and over again to break even before win your profit.