This is misleading.
Decision was made on “totality of available evidence.”
This includes animal studies on the BA.4/5 boosters, clinical trials of bivalent BA.1 boosters, clinical trials of the original vaccines and boosters, and ongoing monitoring of the safety of the current vaccines.
Experts told Healthline that — given this evidence and the fact that the BA.4/5 bivalent boosters are so similar to the BA.1 boosters — there’s no question that the newly authorized bivalent vaccines are safe.
As someone else has commented, I dont think many people queuing up for the tweaked flu vaccine every year cause a big drama, but because it's covid and there's so much disinformation out there, everyone starts doubting the science which got us as close to normality as we are now!