MBFC has a team of multiple writers and researchers - hardly a one-person “hobby.”
It’s one guy who sometimes has the help of volunteers and paid freelancers, with no transparency as to who writes and researches what and as evidenced by their thoroughly negligent
They are highly rated by other organizations like Snopes, Newsguard, NPR, Reuters Fact Chek, etc.
That’s probably more to do with collegial courtesy/not wanting beef with Dave than all of his competitors (and NPR, whose own standards have been slipping perilously in recent decades) actually thinking that he’s great at it.
Or it could not even be that. Your implicit trust in the Hasbara along with you completely ignoring the substantive parts of my comment implies that you may have just made up their trust in Dave from whole cloth 🤷