To be fair, as common of a criticism as this is
In the lore the Wayne Foundation uses Batman's fortune to fight poverty, and a lot of Batman media goes out of its way to show Batman is always willing to give his villains a chance to turn their lives around.
It only fails because retiring a villain permanently is bad for comic sales (But quite a few like Riddler, Mr. Freeze, Poison Ivy, and Harley Quinn at least find themselves in the Heel-Face Revolving Door)
Now Frank Miller wrote a few books detailing why "Rehabilitation is naive and something suggested by the Radical Left because they don't understand how the real world works."
But Frank Miller is a crazy person who also wrote a book where a Pedophile-Coded Batman goes on a killing rampage and Vicki Vale's ass talks to the reader.