Are we supposed to just accept labeling misinformation and suppressing claims that we don't actually have any evidence for or against, just based on "previous k

Are we supposed to just accept labeling misinformation and suppressing claims that we don't actually have any evidence for or against, just based on "previous knowledge"? It's not that Pfizer was wrong to say that the vaccine would reduce transmission (after all, it did), but was wrong for authorities deny the possibility of breakthrough infections and transmission from vaccinated people (which was labeled misinformation for quite a while). There's a vast, vast difference between saying "reinfection and transmission is less likely" and saying "reinfection and transmission is impossible". The latter was the only permissible line, and anything less was labeled misinformation for quite a while. If we're going to label something as misinformation, we better be damn sure it actually is false. Otherwise trust in our institutions will plummet.