Why Do People Believe in Luck?

Imagine you're playing a game, and someone wins even though they didn't try very hard. You might say they were lucky. Luck feels like something that happens without people really trying. But why do we believe in it? Sometimes it's easier to think things just happened by chance than to think about all the work or mistakes behind them. People use luck as a way to explain things quickly, especially when they don't want to face the full story.