WHO is giving medical advice, not legal advice. There isn't a contradiction here; if, because of local conditions, local government has prescribed you to wear masks when you go shopping, it isn't because your local government is making a medical diagnosis about you. It's because they want to stop the spread and they can't know that you are healthy or not.

This isn't a hard call. Neither is restricting people promoting miracle cures that lead people to swallow fish antibiotics in the name of "free speech".

Big companies have a responsibility to fight misinformation. Letting the public "figure it out on their own" is simply social darwinism, and it's cruel.