Yes, that's true abstractly. However, A, those sorts of references are much less common in web pages than in physical descriptions (at least in my estimation) (though they're very common in APIs), and B, those repointable references are not the same as a search - I want to uniquely refer to the current value of this pointer, while allowing the publisher to relink as appropriate.

The article reads as universal URL design advice, but I'd argue the points only really apply to APIs.