I see this kind of error pretty frequently, and it's usually not a failure of mathematics... Most often, the person has some pre-existing negative emotional reaction to the stated conclusion, and their brain searches for something to criticize, in order to soothe those negative emotions.
I could only speculate as to why the original poster doesn't like hearing that an existing drug shows promise in treating COVID. Maybe they're a big Ivermectin booster, and they don't like the idea of another drug threatening their favorite?