I think majority of people who are addicted to gambling is because they do not understand gambling as beginners, the rules and the side effects of playing gambling excessively.
They do not understand or they let themselves be drown in gambling believing that they can gain huge. Because this is the usual reason of gamblers who became addicted. They can't stop playing, unable to control themselves due to this desire of gaining money. I agree that if these people (trying to engage themselves in gambling) are aware of the rules and the bad effects that it might cause if you gamble excessively then they can prevent themselves becoming addicted.
This is one of the major reasons some newbies fail in the gambling space or end up becoming addicts . When a person has the notion that gambling is an opportunity to gain money and become rich within the twinkle of an eye, because the think they will hit the jackpot then their psychology will obviously work in that direction. You find out that such newbies continue to stake heavily over and over again having high hopes that they will hit the jackpot in no time. And sometimes before the realize, addiction had already probably kick in. The truth is gambling is a supposed fun activity with the added benefit of extra cash when you make a a win and not some get rich quick scheme.