That something plays into a harmful trope doesn’t speak to its veracity though, and diminishing smaller inconvenient truths so as to not lead people astray in my opinion exacerbates rather than diminishes conspiracy theories.
Could probably have prevented a lot of wasted time, money, and endless internet arguments by saying something early on like “ivermectin, which humans are regularly prescribed, does look promising for treating Covid, but only at dosages that are very toxic to humans, or in populations that might have parasites, as a result of curing those parasites”, instead of the “lol it’s only for horses!” stuff, or by clearly stating “lab leak is possible, and not the same thing as an intentionally man-made bioweapon unleashed by Chinese people”.