Earlier quoted context omitted.
These are some strong statements without any reference. Haven't you personally dealt with any situation in which you have to take a decision based on incomplete information? That was covid for most part of it. You could compare it with a bet, and some bets look retrospectively "bad" (although we have no way to check, don't we?) There were also plenty of "fringe voices" with ideas that were proven wrong over time, so…
Claiming things to be true that had no evidence is not the same thing as making decisions with partial information. The mRNA shots were not tested at all for transmissibility yet we were told they prevented transmission. Thank goodness some people have a memory longer than 2 weeks.
Data that has come out since does seem to indicate it lowers transmission.
But I'm unclear if you're trying to say that this turned out to be false (the reduction in transmission), or that you're pointing out how some policies were driven by claims that didn't yet have strong enough evidence backing them up?