By late 2020, when they got approved, the vaccines were not scientifically proven safe for mainstream use. No other mRNA vaccine had been through all the trial stages, and certainly not those COVID ones.
Could the vaccines have side effects that became visible after 6 months? Yes and we couldn’t have known that they didn’t.
Could the vaccines have side effects on people with rare conditions? Sure, and we couldn’t have known that either.
My point is that in 2020, the decision to approve the vaccines and pretty much force everyone to get it was a risk tradeoff. It was way more risky to let the disease continue spreading and mutate than it was to release the vaccines. mrna vaccines had been in trials and there was no reason to believe they could have been harmful. But the reality is that we just didn’t know. Biology is complex enough that you can’t just assume everything will be fine without proper testing. And what we deem proper testing is a process that these drugs hadn’t gone through.
I happily got vaxed in early 2021, and did it again 4 times , so I was willing to trust the tradeoff.
But ignoring that it was a tradeoff and hiding behind a sign that says “science” is just taking people for dummies.
How large a trial do you want to run to capture "rare conditions"? Millions? Billions of participants? How long do you want to run trials? Years? Decades?