I also find this a really odd line to draw. The fact that treating ICU patients with anticoagulants is standard does not automatically mean it’s useful for long COVID patients. If it turns out that it’s useful, awesome, but it’s not obvious a priori.
Pretty cool that they're ahead of the curve on this.
Even if they didn't know about long covid officially, they followed the known science up to that point, and this is incompletely but interesting new data that's showing it's helping more than possibly known at the time.
If someone published a study that CTE resolves with a month of Tylenol supplementation, this would be huge news. The fact that acute concussion pain is treated with Tylenol in no way implies this result.
In that sense they were ahead of the curve because its looking like it is helpful with long covid as well, which is great news!