The problem is that nobody in the history of medicine have ever solved an pandemic once it left a containable area, but as most epidemics follow an bell curve you get a lot of people thinking some action or another solved the problem.

Add to that the story driven way we get out version of the truth and there is now an irresistible pressure on the politicians in charge to do something and to claim that something was effective the data be damned, and that real science is never 100% sure and tend to take years if not decade to come to any kind of conclusion.