Good point.
It often comes back to “works” and people who think they must “earn” their reward.
It is all in God’s hands. God saves us and places us in our circumstances to use as He sees fit. It is not our works that are necessary, but His.
Paul take a harder stance and says that “self righteousness” is a sin. We attempt to take control from God. We create a salvation that doesn’t need God.
Jesus tried to teach this to His Disciples. “Unless you let me wash your feet, you can have no part in me”. Our religious systems are designed around the principle that we wash our own feet.