This quote from the article says it all:
“Long story short: of the 126 people listed by Paulkovich, there are only 10 or so whom we might expect to have written about Jesus. And it’s probably worth mentioning that there are, of course, writers from the first centuries CE who refer to Jesus, and even write quite extensively about him. But since those authors all got bundled into a collection called the New Testament, we should probably just dismiss them from the discussion.
By his own admission, Paulkovich isn’t the first writer (by which we mean philosopher or gynecologist) to take this approach. In 1909, John Remsburg compiled a list—strikingly bereft of characters from I, Claudius—of 41 authors who never mention Jesus. The premise of both lists is the same: if Jesus was super-famous, a “mythical super-Savior,” then how is it that no one talks about him?”
And no mention that both the Romans and Jews of the first century had a vested interest in quashing the early Christian movement and certainly Nero did so. It's not like the printing press had been invented yet, and it's miraculous the writings we do have survived. I would suspect if the truth ever be known, there was probably a much more robust record that was torched and suppressed. I would not be surprised if more writings someday surface a la the Dead Sea Scrolls.
Why do some of these idiots think Jesus was a celebrity?