That's actually the theory I developed the first time myocarditis in skinny teenagers was reported many months ago. It just makes sense that spike protein mRNA is getting shotgunned into their heart muscle cells. So, I was rather disillusioned when I saw that theory finally pop up in the news in the last month.

Saying the vaccine didn't cause the myocarditis because it was "injected wrong" isn't a compelling argument to me, or likely to anyone that's thinking rationally.