system
Given the following post, respond as if you're commenting on Reddit:
human
[DC] Is there an in-comic explanation why so many Batman villains get sent to Arkham Asylum?

The insanity defense only has a 1 in 5 chance of actually succeeding, let alone for people who very clearly know the difference between right and wrong, so then why do so many homicidal Batman villains get sent to Arkham Asylum? 

There are some villains that are actually where they belong. Two Face, Mad Hatter, the Ventriloquist, etc. But most of them should just be in prison. There are some in Arkham who aren’t even remotely insane, like Hush, Calendar Man, Mr. Freeze, and the Penguin; but especially Penguin. What the hell is crazy about Penguin, the fact that he likes birds a lot?
gpt
Many are insane yes, but Arkham is also better equipped to handle metahumans and enhanced individuals such as Killer Croc, Mr Freeze, and Poison Ivy. It's not just a mental institute, it's a special needs prison.

Also point of clarity Calender Man is an ocd serial killer and absolutely insane, and these days when actually arrested Penguin gets thrown in Blackgate Penitentiary, not Arkham.