I agree with the gist of the article, but it I noticed it didn't mention the research that some classes of experts actually make worse predictions than a class of generalists... I think referred to as wolves and foxes, but I can't remember.
If you like that, you might also like the book Expert Political Judgement by Philip Tetlock which uses the Hedgehog and Fox metaphor to analyze people's political judgements.
https://duckduckgo.com/?q=expert+political+judgement
Also, for anyone interested, one of my favourite talks is about a study of political forecasters and their accurancy over the years, seen from this perspective: (the video is paywalled, but the audio is free):
