If you want an authoritative opinion on the societal impact of something I would want the opinion of someone who studies the societal impact of things.
He received a Turing Award for his work that was foundational to the current state of the art.
Isn't that ad hoc ergo propter hoc?
That argument would also support the statement "he went all in with 2-7 preflop, and won the hand, so he must be good at poker" -- I assume you and I would both agree that statement is not true. So why does it apply in Geoffrey's case?