When someone who was vaccinated does, whether it be myocarditis, or something else, they say it couldn't be from the vaccine, so there is no need to look into it.
That seems real sciency to me.
They commit the Logical Fallacy of Sweeping Generation in both cases.
Logic is the foundation for science and many, but not all, on the left are hyper-emotional, so that or just outright evil deception, or both, may be why they posit those explanations.
Exactly; they are hiding the impact of the shots themselves - especially as younger, healthy people die unexpectedly.