Is Hell or Prison the best cure for immorality?

[Rabb Allah]

All religions as of now have at least some concept of divine punishment for immorality and it seems to me that this has worked to a varying degree all until mankind stopped believing in hell. Although there are the religious wars and what not. But on the small scale level it seems to have done something.

Is a just hell better than a just prison?

Couple things: one, if we're talking about a just hell, we can't be talking about any of the religious ones, because an eternity of any kind of punishment isn't just, nor can it be a cure for anything- as you allude to in your thread title- because it's clearly not there to get anyone better. It's there as retribution for not staying in line.

Secondly, does a punishment devised by an entity that assumes power for itself without ever having to earn it, who excludes the possibility of ever being recused or losing any of that power no matter its abuses, who requires no consent in order to govern you, and assumes a worldwide jurisdiction independent of any kind of legal checks and balances, sound just to you? If any person did it, you'd consider that an unacceptable dictatorship; why does whatever form of god get a free pass?

I am talking about a hell where people earn their rightful punishment for. A rightful amount of time. Also God has the right to do anything if it is a demiurge so God has earned his sovereignty rightfully so.