Critical distinction: it is the WORKS that are tested and potentially destroyed by fire, not the person

In purgatory doctrine, it is the person who goes through the fire and is purified. But in the text: 'each one's work will become clear' (not 'each one'), 'the fire will test each one's work' (not 'each one'). The fire does not purify — it destroys inferior works. Precious stones pass through fire unchanged; wood is destroyed. The purgatory concept requires purification, but the passage describes destruction of inferior materials.