But that’s not the point.

Batman is a presence. The Wayne’s as a story element, they are supposed to be moral & ethical pillars. Solid truth. Batman does not kill and preserves an ethical truth.

All while the joker is a shifting description… an unreliable narrator. not a pillar not anything solid or true. The villains can shift and don’t have to hold true to anything. The killing joke is all about the lie and shifting excuses…

The movie may suck but a shifty joker hasn’t traditionally been the reason.