If this is your issue then we need to also make the clarification of what is exactly happening.
The studies that happened, all published and available online via government websites. They aren’t dumbed down for lay people, just the technical documents provided by actual scientific researchers. All of that is not being censored. If you have evidence of the government actually tamporing with medical publication then we have a bigger issue.
What is potentially being censored are generalized publications on non-medical, non-technical forms. The reason for allowing this type of sensoring are many of the previously mentioned.
So I think a better question to ask is why are people seeking any sort of informed statements from FB on medical conditions? At best what should be found on those sites are statements as to why one should be worried about a pandemic, that a vaccine exists and you should seek advice from actual medical professionals. Side affects should NOT dictate the default stance on a public health issue. If you are worried about them, having been susceptible to side affects in the past, then you should speak to your doctor.
If you can’t get the vaccine without the inclusion of a doctor, nurse, or pharmacist then you shouldn’t be given medical advice of any sort from the same laymen. FB should not be allowing any sort of information about medicine beyond it exists, and it is important you go talk to your doctor.