People are just greedy, greedy for money and they are all looking for a way to get rich quick. Some people believe gambling is the way to go, just because they won 1 time big they will keep trying to win again and again. Gambling biggest problem is that it is addictive. You cant control yourself from it once you start it. I am writing the Book on Gambling Habbits. Hopefully it will be in market next month. 
the one who believe gambling is the way to go is those who one short win big money like millions of dollars. those who keep gonig to casino are usually those who gamble for entertainment, and of course want to earn some bucks.