Public health authorities regularly perform that kind of risk-benefit analysis. Here's one by the FDA looking at the 5-11 age group: https://www.fda.gov/media/153507/download
My understanding is that this analysis assumed the observed myocarditis risk of the 12-15 age group would also apply here, but IIRC more recent data shows no myocarditis cases at all for the younger group.
There's a theory that links the occurrence of myocarditis to high testosterone levels, but that hasn't been proven yet. Existing data shows that the increased myocarditis risk (more or less) only applies to boys/young males.
Thanks for flagging this. This data to me looks pretty murky in places.
Look at the outcome for young boys. They would expect 67 icu stays for Covid, 57 icu stays due to the vaccine. And there are a lot of assumptions baked in there.
(Numbers for girls are better)
With numbers that tight, why introduce a drug that might for children have non-obvious long term effects?