Staying logged out off Google at all times is slowly becoming basic web browsing hygiene. Picture a situation:

- You interact with a bot in a mostly-idle, public chatroom (such as !commands on Twitch)

- Bot pastes a url-shortened link that redirects you to a Google doc

- Anyone who had that document already open can now link your Twitch identity to your Google identity (which may include real name+photo)

Granted this particular vector has been open for well over a decade, it may just catch you off guard sooner or later.