My complaint was with the wording and generalization. "Not everyone has/needs a postal address" is true, "you do not need a postal address" is not - living in a big city, I don't get mail that's even slightly mislabeled. And yes, that's a nitpick, but I was mostly objecting to a sweeping statement with a Twitter link that doesn't clarify much.

(As for the specific question, postal addressing is fascinating. Someone in my family has an unusable address with an alphanumeric house number, and Amazon won't ship to it. And in the last one of these threads, someone mentioned living in a country which uses standardized directions-from-landmark as a formal address!)