unvaccinated

We keep hearing how rare vaccine-induced myocarditis is. First they said the rate was something like 1 in a million. then 1 in 100k, then 1 in 10k, and now they are saying it is as high as around 1 in 2000 in certain demographics like adolescent/young adult males.

But ok, we will say 1 in 2000 is still rare, so let's just assume myocarditis isn't even an issue.

But my concern is, how do we know there won't be long term damage from the spike protein, such as heart attacks, even in those without myocarditis?

This paper from Harvard implies that circulating spike protein causes vaccine-induced myocarditis:

Myocarditis that arises after receipt of an mRNA-based COVID-19 vaccine among adolescents and young adults does not appear to result from a heightened overall immune response or from autoantibodies, new data suggest. Instead, the complication seems related to how some individuals process spike protein, produced by the body using the vaccine’s mRNA as a template. Levels of the antigen were unusually high among those with myocarditis.