Or concretely, would the Israeli wars end sooner if Netanyahu was pardoned of all crimes? Would Kim Jong Un consider giving up his position if he could be pardoned, or at least credibly believe that he could live a life in luxurious exile? I don’t know the answer to either of those questions, but I do think letting some people get away with crimes with witness immunity can make it much more difficult for criminals to organize as the optimum move is to defect before anyone else does. Which is why I think elite blackmail focuses on unforgivable deeds.

They're a release valve for "the system fucked up and permitted an injustice".

Avoiding responsibility isn't the goal, and shouldn't be possible.