If I had not caught Delta in June, according to when I was fully vaccinated in September 2020, the expected VE (efficacy) against wild covid (ie original covid) would be 63% right now for me. 63% is not slightly less.
So almost a coin flip. If you factor in the decrease in VE from delta it would be closer to 33% VE(which truly not just slightly less than 96% VE 2 weeks post 2nd shot) . A booster would “probably” bring it up into the 90s. So for those who have had Pfizer a booster is very useful.
Pfizer Is providing the data to FDA, FDA will approve booster for general public, the science is supporting it, I have not seen one study that is suggesting that ( for Pfizer) a booster is not needed. People and scientists had “hoped” it was not going to be needed, but the decline of VE over time and the rise of delta has provided the data that makes a Pfizer booster inevitable.
Assuming the booster trial in progress now demonstrate safety and efficacy ( Phase 1 data suggests this) EUA of Pfizer booster for general population is inevitable.