The fact is many people tend to misinterpret gambling as gaming sometimes. Of course gambling activities are of different types and setups and if you check majority of them are just regular games kids can play (of course without involving betting especially with money) or predictions anyone can probably do. In my opinion the main thing that differentiates gambling from the regular games involved is actually placing a bet or wager on any particular prediction or game type.

Even if different people have different core reasons why they gamble, it still all comes down to the fact  that they don't want to lose money too but in the case of regular games you don't need to worry about that.