Canada's National Advisory Committee on Immunization's revised guidelines, the new guidance calls for the Pfizer-BioNTech offering due to "Lower reported cases of myocarditis/pericarditis ... compared to Moderna Spikevax."
What myocarditis/pericarditis? This is a conspiracy theory. The vaccines are safe, bigots. Take your poison and shut up.
This discussion is about mild infection, not scarring of the heart muscle.
When a doctor at Western University Hospital splits open a person's chest to work on their heart extreme care has to be taken to avoid exposing them to a wide variety of infectious agents.
That is a far different scenario than the 0.00015% chance that anything at all will happen with covid, let alone the one in a million chance someone will die from myocarditis.
Here are the links again: http://www.bcchildrens.ca/about/news-stories/stories/myocarditis-pericarditis-and-the-covid-19-vaccine and https://www.alberta.ca/assets/documents/health-myocarditis-and-pericarditis-following-covid.pdf