There are many reasons why someone gambles. But, in my opinion the main reason for someone to gamble is to find money and entertainment (for billionaires who have excess money).
Gambling seems to have a magical effect that makes people addicted, even in some cases they become bankrupt in just one night. So, as you say "Anything can happen in gambling" is true.
The most important thing now is how we can manage our desire to gamble and how many of our assets we can bet on.
It is not purely magical, for me gambling is somehow with the desire to revenge and to take back your loses and people call that as being addicted to gambling. In other ways, winning and being greed in winning at still the same, being addicted.
What other things could we be called aside from being addicted to gambling when playing allot? There's non, for me the problem here is the people saying that word because for us, gambling is a sort of passion, a lifestyle, an income and a risk for us who love to take challenges.