> Seems like people prefer to downvote rather than try to give a compelling answer to the question "is the literature on long term side effects of mRNA vaccines extensive".

I think it might be because people are confusing asking questions with being against something. I am neither against vaccines nor mRNA vaccines particularly. I just genuinely want to learn the details. I think it is important to know upsides and downsides of each vaccine out there since there are several alternatives.