What you don't see here, for example, is any mention of a "President of Science" or other committee making that call, nor particular suppression of lines of inquiry.
You're right, though, public vaccine discourse would have been significantly better if we required internet research experts like Joe Rogan or any of the talking heads on Fox to have a PHD in immunology or epidemiology or at least a double-masters in biology and economics before we allowed them to speak to more than ~ten people at a time.