Earlier quoted context omitted.
It seems like if you take everything into account, taking the vaccine might not provide any benefit from men under 30. Any medical intervention must be beneficial to justify the use. If it's so and so, or equal risk, then it's not done. EDIT: The alternative is not stopping vaccinations. Men under 30 are given Pfizer.
The number of C19 fatalities under 30 in the US appears to easily exceed the number of vaccine-related myocarditis cases. The overwhelming majority of those myocarditis cases followed a benign course. Later Another thing to consider is that the myocarditis rate from C19 itself may exceed that of the vaccine, which would basically refute the argument against vaccination. (By all means, pick vaccines strategically.)
No, because you need to consider not just the odds of getting myocarditis from covid vs vaccine (Pc:Pv), but the bayesian probabilities of getting infected (Pi) or vaccinated (1) and then getting myocarditis, such that the full risk analysis would look more like Pi*Pc:Pv[1]. Point being when you are talking about vaccinating the entire population, you can easily end up in a position where there are more cases of heart inflammation from fully vaccinating the population than simply letting the virus run its course. I believe the term is relative risk reduction but don't quote me.
1. This isn't quite right, there should be a 1-x term or two in there somewhere to account for the probabilities of getting vaccinated/infected and not developing myocarditis, but its been a few years since my probability course...In any case the point still stands, that the vaccine may be less likely to cause heart inflammation does not imply that it would produce fewer cases overall if a sizeable proportion is vaccinated. To properly estimate that you need an accurate estimate for the myocarditis rate from both covid and vaccine, which I don't think anyone has.