This is silly because of the strong evidence that has emerged about long COVID. We know there are often significant long-term complications to COVID. You can se

This is silly because of the strong evidence that has emerged about long COVID. We know there are often significant long-term complications to COVID. You can see things like reduced grey matter volume in people who have had COVID across multiple regions of their brain. Yet for mRNA vaccines there is simply no reason to expect anything remotely this bad. You're positing that there could be surprise side effects into the future that will, with non-trivial probability, outweigh the long-term side effects from COVID (e.g. literal brain damage) that we've already observed. If long COVID wasn't a well-established observation, then I'd grant that you have the ghost of a point.