Hi!
there's some difference between external IDs and other properties - namely, the former convey almost no information useful to a human
Did you mean the opposite?
I meant when you're looking at the page for Douglas Adams, you can see that his birth name was "Douglas Noël Adams" and this is useful for you as a human reader. But before that, you see that his "LNB identifier" is "000057405" and in 99.9% of cases it is not useful for you since you neither know what "LNB identifier" is nor you need to see one unless you're a Latvian librarian working on integration with Wikidata. Now, I imagine there is a lot of uses for such identifiers, and I am in no way call for diminishing their role or somehow questioning their importance as data, but *presenting* it as the second most important knowledge we have about Douglas Adams right after the fact he is a human looks wrong to me.