Everybody deserves a 2nd chance?
No.
Why do they? Where does this "right" come from?
Nature itself is most unforgiving of error.
Survival is often either/or.
The animal either takes the correct action or it is breakfast. No 2nd chances.
Humans have so much of a cushion with a technology-society that they indulge in notions far removed from reality by trying to change the core personality.
You don't change a criminal with therapy; you make them smarter at fooling you about themselves (or, fooling themselves about themselves.)
You can convince a drunk to refrain from drinking but they are still an alcoholic.
An alcoholic is not potentially violent.
But, a killer or molester is. Why give them (instead of a 2nd CHANCE) a 2nd OPPORTUNITY to destroy somebody?
All the therapy, group sessions, education and such in the world doesn't change anybody into something beyond their own nature.
Put a cannibal in a tuxedo and remove the bone from their nose and send them to college. They are still a cannibal.
When they look at you across the dinner table what do they see?
I don't know how many people know about boxing and boxers, but; a boxer well-trained to make the "correct" moves always reverts to his orignal (natural) style when he is hard-pressed. Always. You cannot train it out of him.
We all have natural moves, thoughts, appetites and dispositions. You can teach us to act differently ("act"). But, we are still acting.