Actually, to follow up on that, there've been a few articles about him, and on Quora[0], the author of a WaPo article[1] says "Of the site's nearly 5.7 million pages, Pruitt has edited a staggering one third."

If this guy is correct, the edits are sufficiently spread across different articles for him to have touched 1/3 of them. Still obviously not the same as writing, but it puts the headline in a slightly less absurd light.

[0] https://www.quora.com/Who-is-Ser-Amantio-di-Nicolao-of-Wikip...

[1] https://www.washingtonpost.com/lifestyle/magazine/meet-the-m...