This suggests FDA approval doesn’t say much about whether something works—presumably it still says something about safety. At any rate, whether or not FDA approval means much, to a certain subset of people it ostensibly did, since the objection that there was only an EUA was fairly common.
If the treatment is ineffective and carries any side effects, then it is a safety issue. The whole "do no harm" principle means that you are subjecting a patient to unnecessary risks and side effects with no possible benefit.
