The Gell-Mann thing is dangerous pseudo science, stay away. It's not even invented by a scientist. It's the excuse people go to to disbelieve something they see in coverage, or to win arguments about "the media" or "fake news". If you want to dismiss something as a falsehood, you have to do it with evidence, not quips. This article is an excellent example.
The Gell-Mann amnesia effect doesn't say "all news is bunkum", it says "the news media consistently make obvious errors when they report on physics, they probably make similar errors when they report on your field of expertise, so take what they say about other things with a pinch of salt". There's a world of difference between cynicism and scepticism.
