I didn't flag this for being heretical; I flagged it for reducing confidence in public health measures. Am I certain everything I believe is true? No. Neither does the public health leadership. However, they are operating in good faith, with overall health in mind, and they aren't intentionally cloaking massive amounts of vaccine reactions with the goal of ... well, I'm not sure what. Yes, some vaccines have side effects, some of which are serious. But we've already determined almost certainly that they are overall safe enough to justify wide use.
A data scientist who is an ex-biologist who is quoting line doctors and cobbling bits of social media isn't some powerful truth-finder. They're just muddying the waters and making it harder for the public health establishment reduce mistrust.
I also don't think there is any interesting rational discussion that's going to come from posts like this since they don't rise to the level of scientific discussion.