Look at the language in that article, very untrustworthy...
Correction: As I read through the article, the rate is (at high end) of US expectations, 10 in 100,000, or 0.001 percent.
Here is a link to the research itself
This case series describes myocarditis presenting after COVID-19 vaccination within the Military Health System.
jamanetwork.com
Two key takeaways:
"
Notably, myocarditis cases were not reported following vaccination in clinical trials of current COVID-19 vaccines."
The possibility of myocarditis has been pretty well documented from what I've seen. And IIRC, it is worse from COVID than from the vaccine.
and
"
Given that COVID-19 vaccines are remarkably effective at preventing infection, any risk of rare adverse events following immunization must be carefully weighed against the very substantial benefit of vaccination"
As always, there is a choice to make. It is a choice of tradeoffs, and we should try to make the prudent choice.