No. It doesn't. You don't have comparative evidence to support your statement given the Covid 'vaccines' are too new and all relevant information about safety issues is usually suppressed.
Myocarditis associated with these vaccines according to multiple sources (peer reviewed) are self limited, and not fatal. the incidence if myocarditis is 5.6 / 100,000 all comers under 18.
The article says he hasn't been assessed for myocarditis and goes on to advise those receiving 'vaccinations' avoid strenous excercise (he was lifting above his weigh) for at least 7 days following 'vaccination'. He was 5 days post 'vax'.
Peer reviewed often means nothing now that Fauci/CDC/Deep State enemies own the 'peers'. The Lancet trash article was 'peer reviewed' too.
Your myocarditis stats are too low - no one willfully, actively tracks this illness. They aren't studying all who get the vax to count how many myocarditis events occur. The only cases of myocarditis that 'count' are the ones they couldn't hide because people are hospitilizaed or die etc.
In fact chest pains, fever, muscle soreness, fatigue and other symptoms which could point to myocarditis are considered common. Yes. They've trained the public to placidly accept symptoms which may point to myocarditis as 'normal' so many try to sleep it off or push through and excercise.
Many people report that they lost their energy and just were 'never the same' after injection and we don't know what the causes are...yet. Heart failure, myocarditis etc. Lots to choose from.
You categorically say that there is no other differential diagnosis. You are incorrect. Familial q on T, IHSS (also known as hypertrophic obstructive cardiomyopathy), SAM. There are many things of primary cardiology etiology in this age group.
As for The statistics you dismiss you fail to give leave that most if not all myocarditis and pericarditis are brief self limited disease with complete resolution. Myocarditis snd pericarditis are non-specific inflammatory states caused by several things including viral infection and vaccination as part of the differential. I think that there is probably a true risk of these inflammatory states and in the well over millions of vaccines we have seen 56 cases in a million which is the same as 5.6/100,000
I am just sticking to the facts and what we know in standard differential diagnosis