In ESPN's defense, they're incredible at establishing someone as "The Guy" for their relatively niche field and then coasting on that.
Mel Kiper is horrible at draft projections these days, but he's done more than anyone to help turn the NFL draft into an event.
Matthew Berry was one of the first widely published fantasy football experts, but is often one of the least accurate now.
And the aforementioned Lunardi. Nobody is better at awarding themselves laurels and then resting on them than the world wide leader.
Lunardi/Kiper are examples of guys getting in on ground floor. There was definite niche interest among fans for those specific topics & analysis, there wasn't a lot of access to in-depth and consistent assessment, especially when Internet was in its infancy.
They still have
general reliability, but, in the case of Lunardi, it seems aimed toward people who follow CBB somewhat closely, but have almost no clue about the tournament selection process. Dozens of those people exist, I'm sure.
(I can't speak to Berry & Fantasy, I imagine it's a similar thing).