With some insider knowledge: Because this document is commentable for (some) Googlers, though you don't see the comments on the /pub version that is accessible

With some insider knowledge: Because this document is commentable for (some) Googlers, though you don't see the comments on the /pub version that is accessible externally. Docs would rather force you to verify your state (Logged in or anonymous) than having some things 'not work' because you're expecting permissions from login cookies you don't have.