What's also being implied with background checks, even when they say it's relevant like with checking if a pharmacist has drug charges, is that prison does not

What's also being implied with background checks, even when they say it's relevant like with checking if a pharmacist has drug charges, is that prison does not work. If it reformed people, it wouldn't matter what your history is, because you went through a reforming process and learned to manage the root cause of why you committed a crime, like poor mental health. Instead we just send people to prison for our own sense of "punishment".