This is simply a clarification and precise usage of wording:
Though diagnostic thoracentesis may be used therapeutically, this is only one of a variety of possible management techniques and has specific indications. This card would be better served asking a confirmatory question, rather than a treatment under non-specific conditions. My only caveat would be if the associated UWorld QID (#4087) is testing on the knowledge of when to perform a therapeutic thoracentesis, then the card should be rewritten to be more specific as described in AMBOSS (thoracentesis -> Indications -> Therapeutic thoracentesis)
Pleural Effusion: https://next.amboss.com/us/article/F50gNg?q=pleural%20effusion#AAaRmM
Thoracentesis: https://next.amboss.com/us/article/tt0X23?q=pleural+effusion&utm_medium=anki&utm_source=navbar#Zf8c6a207291e79a303cd2b3ab3e2c338