alt Hacker NewsNo there actually is in general and it's the same exact way in which there's generally good guidance for medicating your children: they're called evidence-backed guidelines.
The contexts in which drugs make sense is captured by the clinical guidelines.
And sure, it is arguably questionable whether there was ever a net benefit to an average young kid to get a COVID vaccine. However that is a distinct claim from "it never made sense to give kids COVID vaccines." There was certainly a point in time in which a logical interpretation of the information available at the time indicated that kids should get vaccinated. The risks were (correctly) understood to be near-zero and the benefits were (arguably incorrectly) understood to be significant.
Someone who, in early 2021, decided against vaccinating their children was making a decision that was not indicated by the best-available information at that time.
Someone who bets on Red doesn't get to claim they were "correct" in betting on Red even if Red comes up, and certainly not if Green comes up (arguably neutral outcome).
This is the "nobody got fired for buying IBM" argument. It works in a world where you have trustworthy institutions and its safe to just outsource your decision-making to the authorities.
Your interpretation of events might be that a collective of all well meaning people just got it wrong, and that's your right. A lot of people ended up with different conclusions, like the machine did what it does and made a lot of money, the truth be damned.