I'm not confident one way or another. But I'm not ready to take this story at face value as a sad story of a vaccine being recalled because of a few loud-mouthed anti-science idiots just because "no causal-link was established by the FDA".
Health-policy and politics in general have a perverse effect on the science. What was the official stance of the government one day becomes misinformation the next, and vice-versa. I think it's important to recognize that going with the narrative of the government is a political stance rather than a scientific one and that it reflects trust in the system rather than anything else.
Over the years my government has given me many reasons not to trust it blindly when it comes to medical issues. Our legal system recognizes that finding a causal link is not the end-all be-all of medical responsiblity and my personal experience reflects it as well having just done a risk-benefit analysis to convince my sister to get vaccinated, using the information provided by the health-authorities of my country, and discovering afterward that some serious side-effects are not being reported.
I don't disagree with the principle behind what you say. But the application to where you are acting under the assumption that Pfizer caused your sister's side effects seems unwarranted. It's certainly worth investigating, but it is far from a certainty.
