I don't think it's a special pleading. Covid is a nasty coronavirus but it is ultimately an incremental change in a very widespread kind of virus that humans have coexisted with forever. Human beings have evolved to survive this kind of thing as a species. This is the kind of risk that a species has to be equipped to survive to have made it this far. Which is not to say that a virus can't come around and wipe us all out, but it would be a truly extraordinary event.
For all we know, mRNA vaccines can alter your gametes. We don't know because this is the first time we ever use them. They aren't like viruses or weakened viruses. They are just a massive injection of genetic material (much of it deformed) that encodes a single foreign protein. No human being has ever had such a thing done to them until very recently. mRNA vaccines are not part of any natural process that modern humans or our ancestors have had to withstand to get to the present day.
For all we know, mRNA vaccines can alter your gametes. We don't know because this is the first time we ever use them. They aren't like viruses or weakened viruses. They are just a massive injection of genetic material (much of it deformed) that encodes a single foreign protein. No human being has ever had such a thing done to them until very recently. mRNA vaccines are not part of any natural process that modern humans or our ancestors have had to withstand to get to the present day.