Did you read the rest of the paragraph that this quote is from? He goes into quite a bit more detail about this and provides several links if you want to learn more.
The fact that this thread went downhill immediately does indicate this might be a really good guideline.
I wasn't trying to be rude, I legitimately think that the rest of that paragraph was a really good answer to his question.
It’s why the guideline is so brilliant, imho.
It is showing us something that isn’t obvious.
You are being well meaning, but there’s something about the question ‘did you read ...’ that gets people going when they are maybe on the fence about how combative they want to be.
Is that the theory you were trying to validate with your question?