So is myo-/pericarditis actually harmful if it comes from the vaccines or not

No.14116722 ViewReplyOriginalReport
I'm wondering why the vaccine induced cardial infections are somehow not dangerous but the ones from covid are. I know that the dose of S-protein produced from the vaccine is smaller, but why should that matter if there are noticeable symptoms?

Where is the difference? How can we tell if the infection will have permanent effects or not?