The clown told Batman a meaningful joke. What's the point?

Batman: We should stop. We shouldn't do this forever. You know, one day, I will kill you, or you will kill me. Stop. I want to help you.

Joker: I really want to stop, really. But I can't stop because I'm crazy, you know?

Joker: I'll tell you a joke: A long time ago, there was a mental hospital. Two crazy people are good friends. One day, they were going to escape from prison, and they climbed onto the roof. One of them jumped over the roof and told the second one to jump over. The second one didn't dare to jump and said, "The roof is too high, I will fall to my death!" " The first one said, "I turn on the flashlight and you come along the beam!" " ! ""The second one looked at the first one and said, "I see. Turn off the flashlight when I'm halfway there!" "Isn't that funny? hahahaha ...

Clown: Ha ha ha ha ha ha ha. ...

Batman: ...

Clown: Ha ha ha ha ha ha ha. ...

Batman: Hum, haha. hahahaha ...

The clown's metaphor is that Batman himself is a madman, and the implied meaning of this bridge illuminated by light is the way and means that Batman himself thinks he can save others. But think carefully about everyone in Batman's story who is hurt by others and driven crazy by society, such as two-faced people, clowns, riddlers and so on. Did they really get Batman's so-called help and rescue? A madman is a person whose thoughts and actions are extreme. In a fatal joke, the clown is the real protagonist and the madman. The oppression of society and the ugliness of human nature make him a pure evil and crazy madman with no clear purpose and direction. But isn't Batman the same? The dark society made his parents die in front of him, which became his lifelong nightmare. Because of this, he abandoned himself, abandoned his bright life, turned into a dark knight, devoted himself to pursuing absolute justice, and spared no effort to fight violence with violence, which made some poor people who were forced by society like clowns go crazy unfortunately, and his friends and family around him suffered misfortunes because of him, such as two-faced people, Barbara, Gordon, and the second generation Robin Jason. Frankly speaking, isn't such a person crazy? Clowns, on the other hand, pursue ultimate evil. Two seemingly opposite ideas are crazy in essence, so Batman has created many criminal lunatics and unfortunate people, and clowns have created many people who pursue justice. So the clown knew Batman couldn't save him at all. Even if he kills the clown, as long as there is Batman, there will be criminals like the clown. This is my own understanding. I don't know if you agree or disagree, but it should be right from the values of dc comics. Don't spray if you don't like it