Another reason is that when the holy man to be punished instead, then what is the benefit of jail or punishment.That is why we have a prisoner there, but even when it is not helping anything at all, according to its purpose.
Another reason is that when an innocent person be punished instead. What is the benefit of a prison or a penalty meant that why we need the death penalty even when it did not help nothing, according to its purpose.
One reason is when an innocent person to be punished. What is the advantage of the prison or the punishment that's why we have to have a day when it all executions helped it according to its purpose.