What's the joke about fools walking in the park?

Jokes mean that some people can't understand other people's behaviors or decisions because of their ignorance or stubbornness, and even think that other people's practices are "a waste of time", but in fact, this view is often one-sided and wrong. The joke "Fool strolls in the park" is usually used to satirize people who think they are smart but actually look stupid. The plot of the joke is this: a fool goes for a walk in the park. He saw a man mowing the grass and asked, "What are you doing?" The man replied, "I'm mowing the grass." The fool then asked, "Why do you want to mow the grass?" The man said, "Because the grass is too long, it needs pruning." The fool asked again, "Why can't it grow?" The man replied, "If you don't mow the grass, the park will become a jungle." The fool thought for a moment and then said, "Oh, I see, I thought you were wasting your time." .