TLDR seems myocarditis is going to happen either way for children susceptible, just how bad they get it; worst with getting COVID straight up vs vaccine.

The pediatric hospital experience shows that the risk of patients at any age having cardiac involvement from COVID is uniformly worse than vaccination myocarditis risk,” says Frank Han, a pediatric cardiologist at OSF Healthcare in central Illinois. Like Elias, Han says most vaccine-associated myocarditis cases are mild, without “significant disturbance to the heart function or inability to maintain blood pressure.”

“I make it really clear that we encounter many more heart issues and more severe heart issues from COVID-19 itself compared to the vaccine,” Elias says.