Why Do People Spend Time Playing Video Games?

It doesn’t seem to be productive in any way and people tend to be less social if they spend all their time on online games especially like runescape and world of warcraft. I know that people do it for entertainment like tv but if you play them do you ever wish that you could go out and live your life instead of a virtual one? Are you addicted to video games? Do the online game makers want you to be addicted like the tobacco companies want you to be addicted to cigarettes?