A redirect to the article for Michael Crichton of Jurassic Park fame; unfortunately it appears to have been removed from that page as well. It looks like Crichton is the one who actually came up with the effect, and named it after Gell-Man after discussing it with him.
Here is the page on the edit immediately before being removed from Gell-Mann's article: https://en.wikipedia.org/w/index.php?title=Murray_Gell-Mann&...
And here is the best mention of the effect currently in a Wikipedia article: https://en.wikipedia.org/wiki/Speeches_by_Michael_Crichton#G...
Looks like someone named Wugapodes decided it wasn't an article worth having back in August 2019.
Here is a version from August 2018 that looks about like I remember [2].
[1] https://en.wikipedia.org/w/index.php?title=Gell-Mann_amnesia...
[2] https://en.wikipedia.org/w/index.php?title=Gell-Mann_amnesia...
Also known as the "Gell-Mann Amnesia" effect, where you realize how terribly inaccurate reporting is on topics you know well, but assume that surely they do better for other topics.
They used to have a Wikipedia article about it, but I guess the censors decided it didn't warrant mention anymore. Here is a random article I found on the topic [1].
[1] https://www.epsilontheory.com/gell-mann-amnesia/