I think the main reason why people needs and prefer to gamble because they want an easy to get earnings, less efforts and time. In gambling people tend to satisfy their earnings from gambling even they take risk out of it.
They'll realize in the long run that they are making a bad decision, at first we think making money in gambling is easy but have we thought
about how successful the gambling industry is, they are one of the fastest growing industry, so simple math would tell you that they are profitable
and all of us gamblers are bound to lose in the long run.
That's how the house wprks, they'll let us won at first then they'll find a way to get it back, Personally. We don't really need to gamble, no one says that we should gamble. People have different issues on it. I just gamble because I love playing slot especially when it have a cool effects when i spin. It really relieve my stress from work whenever I hit the bonus round. My focus only is just for entertainment.