>they don't have my Google account in the upper right corner
I don't understand how can someone who doesn't even bother to logout out of his google account or use something like firefox containers care about privacy. The document has to be hosted somewhere no matter what and google drive isn't any worse than random web page which uses google analytics.
Doesn't Google Drive show the identity of someone reading the document to other people reading it, or at least the owner? That's worse than just collecting analytics internally at Google.
I should have made it clear I was assuming that people were authenticated to their Google account. I think most people who use GMail never log out, and might not check the URL and realize they were navigating to a Google doc.
Hit right-click > open in private window rather than left-click. I'm with the other poster, if you haven't de-googlified your digital life and you don't even bother opening this in private / firefox container, then I don't know what you expect.
Then you entirely missed the point of the comment you replied to: that if you willingly impose google surveillance on yourself you really don't have any space to complain about being reminded of it.