The Director of CDC has to be right for the right reasons, not just by coincidence, and carries the whole weight of the responsibility about his decision, both

The Director of CDC has to be right for the right reasons, not just by coincidence, and carries the whole weight of the responsibility about his decision, both politically and in drastic cases maybe even legally. That is a completely different business than voicing your opinion, and apparently the blogger you cite completely misses that point. Organizations like WHO and CDC make their recommendations based on studies which are in turn based on evidence. If you compare that procedure to 2 bloggers who happen to be right about the same topic among 98 other bloggers who happened to be wrong, selection bias alone may make those 2 outliers appear like genuises. That doesn't mean or show anything.