I added that sentence to make it clear that I am not an expert. I am highlighting how this appears to me. I was hoping that someone with experience working in clinical trials would chime in
You could have gotten your point across better without insinuating negative intent, i.e. "As someone unfamiliar with the reporting process, can someone more familiar with the process explain how Pfizer's effectiveness number went from 90% just recently to 95% today? Thanks in advance."
For much the same reasons as you don't want people adding additional baseless speculation to passing observations of you that you may be a pedophile in passing conversation.
This comes across much differently than "this seems like these numbers -- which I confess I do not understand -- seem manufactured by the drug companies to look good."