It is not a judgment at all, but rather purification of the saved.
The saved are already purified by the blood of Jesus.
There is no need for further purification.
If there’s something left that needs purification, the person wasn’t saved, and they are not in purgatory, but in hell.
However, I do suppose that them thinking that they’ll somehow and some time get out of the flames will give them something to hang on to until they realize that it is permanent after all.
True believers have been purified by the blood of Christ.
Titus 2:14 Who gave himself for us, that he might redeem us from all iniquity, and purify unto himself a peculiar people, zealous of good works.
Those who say more is necessary should take heed.
Hebrews 10:2 Of how much sorer punishment, suppose ye, shall he be thought worthy, who hath trodden under foot the Son of God, and hath counted the blood of the covenant, wherewith he was sanctified, an unholy thing, and hath done despite unto the Spirit of grace?
If you don't think the blood of Christ was enough there will be consequences. Man doesn't pay for what Christ already paid for.