They can get away with the statement that “The study findings do not support the use of ivermectin for patients with COVID-19” because given the relatively small sample size in the study the magnitude of the beneficial effects of ivermectin was insufficient to provide an effect at the 95% confidence level normally required to make a firm conclusion in such studies.
Nonetheless, the study does indicate a clear potential benefit to using ivermectin, and given that the drug is almost entirely harmless if properly prescribed, the absence of results reaching a particular (basically arbitrary) level of statistical credibility should hardly be a reason to prohibit its use.