Looks like it's also about general health and luck. I got covid and it felt like a mild cold but a girl I know younger than me had a significant amount of her lungs infected. People misinterpret getting sick while vaccinated to the vaccine being useless or harmful which is not the case. It can be harmful and it's up to the person to weigh the risks of getting covid and possible side effects vs vaccine complications. Yes, the vaccine may have side effects but a lot of times covid is way worse. Myocarditis can be treated like many other vaccine side effects but some cannot and here comes choosing the best from the worst and trying to understand how high is the risk for each of these things happening to us.