Curiously, in christianity there's a heretical work called the Apocalypse of Peter, which describes the christian hell as temporary as well. The short version is that when Jesus supposedly rose again after being crucified, and came back to his apostles, he told Peter about the tortures he saw in hell (which incidentally, became the foundation for the poem "The Inferno" by Dante), and described how those in hell will eventually be saved and risen up to heaven by the prayers of the blessed.
So it transpires that even if we do go to hell, those who go to heaven will pray us up to heaven.
So it transpires that even if we do go to hell, those who go to heaven will pray us up to heaven.
If you believe it, question it. If you question it, get an answer. If you have an answer, does that answer satisfy reality? Does it satisfy you? Probably not. For no one else will agree with you, not really.