The entire "I looked at the data and found it insufficient" thing is by and large cover for people that lack the tools to evaluate the data. They play that card so they can pretend that they're actually intelligent skeptical adults and not easily manipulated idiots or malicious grifters.
They're the equivalent of a random person that hasn't done algebra in 20 years emailing a physicist at CERN about how they've discovered a perpetual motion machine.
I don't really understand what people's expectations were for a new vaccine intended to combat an ongoing global pandemic.