Now a lot of people make this argument that batman should just kill the Joker that by doing this one act he would make everyone's life better, but think if batman were to kill all of his rouge's like 2-Face,Riddler,Penguin,Poison ivy,Mr Freeze,Scarecrow e.t.c
I mean they have killed a lot of people just as much the Joker has.
Batman Rouges are among the best comic book villans of all time. if he were to start killing every Dangerous psychopath in Gotham,would you really want to read Batman stories
Now Im not saying this from a philosophical point that by killing People Batman would become just as bad the criminals he captures,Im saying this from a general point that no one would want read batman comics without his villains and writers understand this,Joker was to supposed to be killed off in his first appearance in but he was brought back because the writes knew they could profit from this.
Now this is Just my opinion you don't have to with agree with it dont want to