Testing the genuineness of the works we did is not the same as suffering to purge us from sin.
The only solution to sin is death. Without the shedding of blood, there is NO forgiveness of sins.
Suffering does NOT pay for sin because suffering is NOT the shedding of blood.
The only way our sins are dealt with is forgiveness. If they’re forgiven, they’re forgiven, we don’t need to suffer for that which we’ve been forgiven from.
Of course purgatory feeds into the works based salvation taught by Rome.
The death of Jesus didn’t actually atone for anyone. He just opened the door to allow poor wretches the chance to work their way in, maybe.