He's a cottage industry journalist in that he only covers a very specific slice of the market. Generally speaking they aren't expected to actually have any experience in the market in question, just a very long contacts list which Meltzer used to have (less so these days).
This is also what many journalists sneer at as "infra dig" - which is how TV reviewers started out before watching TV became a perfectly normal thing to do. Pro wrestling won't ever achieve that level of normality however, which is why you get people like Meltzer instead.