Why not? So, you think the entire purpose is to exact vengeance for your malfeasance?I don't completely agree. Our justice system isn't here to decide who has been a good citizen and who hasn't beyond the scope of the crime.
That's a pretty silly system.
The only logical reasons for a justice system are:
1. Provide non-violent dispute resolution
2. Make society safer by deterring future crime (either through example or by physically removing dangerous people from general population).
It is a proxy for banishment which can no longer be accomplished. The social contract is an abstraction to which we all implicitly agree. Those who refuse to accept it need to be removed or they cause a lot of problems. It used to be they were literally thrown out of society (mechanically). This served as a deterrent to those without the internal ethical/moral frame to prevent them from behaving badly.
Any other system or approach presumes that law enforcement can "stop crime" and/or "right a wrong" which is absurd. You cannot bring people back from the dead. You cannot "un-rob" or "un-rape" someone...