Those aren't very good examples, because a) you're giving the conspiracy theorists too much credit and b) the facts changed. The vaccines were incredibly effective - against OG covid. Then the variants came along. Feel free to correct my memory, but the conspiracy theorists weren't being censored for shouting that the vaccine's theoretical efficiency was under threat from possible future mutations - they were saying idiotic stuff like that it's a government conspiracy to inject us all with mind control drugs.