First I agree that disparities in data could be a result of differing vaccine effectiveness, but the numbers are rarely reported for each vaccine and are often lumped together. This is disconcerting because it is a very important piece of the puzzle.
That said, I watched the US Press Secretary state in her live conference 2 or 3 days ago that 97% of hospitalizations are a result of the unvaccinated. The UK is reporting 60% of hospitalizations are unvaccinated, and Israel is reporting that the Pfizer vaccine is 88% effective against hospitalization. These numbers are quite disparate and lead me to believe that the US reportings are potentially optimistic. 97% is also not consistent with anecdotal info I am seeing on the ground in the US in my small circle. I now know of multiples of hospitalizations of the vaccinated and if 97% is the real number, I should be hard pressed to actually know multiples of people this has happened to.
I’m not saying the vaccines are not effective, but such wide variations in the reporting of the data raises my antennas a bit and causes me to dig a bit deeper rather than just trust what my government is telling me. The US may also be reporting 97% effectiveness against hospitalizations for the Alpha variant because the vaccines seem to be holding up against Alpha better than the Delta variant and possibly the Lambda variant. However, this is me speculating because they are never clear in their reporting. I wish my government would just release all the data and be clear, but that seems to be huge ask these days. I want to be able to put my full trust in them during a pandemic.
That said, I hope the vaccines hold up against all variants. After all, I am a human and would prefer not to get sick or see family members get sick. I just hope we are getting real numbers and not the governments preferred numbers. Time will tell.