The problem with that line of reasoning is that if I put a blog post together that looks believable and claims there were 5 million deaths, many reasonable people will assume the truth is somewhere in between.
You're not an authority nor do you have any data to back it up.
It's appealing to the two authorities of research on the topic, not the FDA versus JoeRogan592's blogspot. So it's not quite equivalent, but your point about fake news is taken.