-snip- there are people who treat gambling as their business because they know how to play the game, the tricks and techniques, but most it is for their entertainment.
That's true, most people seem to gamble because they need entertainment or having fun. It is what we can get from gambling mostly since to earn money regularly is almost impossible. Even we are a professional gambler, I bet not every day to win the gambling with big prizes. The tricks and techniques don't work on all gambling games, some luck-based games aren't influenced by them. The chance to win is always the same and no guarantee at all. 