The sort of people who contradict the WHO happened to be right on this one; they predicted a problem early and tended to pre-empt the WHO on upcoming problems. This was also expected, because the WHO only advises stuff that is already obvious to everyone. Interested parties can offer better advice than the WHO because they can move with news while the WHO has to wait.
Case in point, Chris Martenson of Peak Prosperity runs a prepper/doomsday style channel. He is also a very smart bloke with an honest-to-goodness PhD in a virus-related field. Who are YouTube to say his opinions are less valid than an organisation that can't say "Taiwan" in a sentence and can only say things that are politically palatable to China and the US?
Chris' advice on the coronavirus has been consistently high quality, accurate, sourced and early compared to the WHO. His only fault is his standards for safety are a lot higher than are reasonable. This policy will be aimed at exactly people like him. He has been contradicting the authorities all the way.