The New York Times treats him as an expert: "Eliezer Yudkowsky, a decision theorist and an author of a forthcoming book". He's an Internet rando who has yammered about decision theory, not an actual theorist! He wrote fanfic that claimed to teach rational thinking while getting high-school biology wrong. His attempt to propose a new decision theory was, last I checked, never published in a peer-reviewed journal, and in trying to check again I discovered that it's so obscure it was deleted from Wikipedia.

https://en.wikipedia.org/wiki/Wikipedia:Articles_for_deletion/Functional_Decision_Theory

To recapitulate my sneer from an earlier thread, the New York Times respects actual decision theorists so little, it's like the whole academic discipline is trans people or something.