"MITM proxying incognito mode" is so far from the truth. Google doesn't get the plaintext contents, unlike typical MITM. They don't even know what site you're connecting to because your traffic is sent encrypted to a CDN partner.

That's the snarky remark I was referring to. However, you deserve my upvote for being precise on that, thank you.

Yet, it's already known and established over the years that Google keeps trying to monopolize data and has taken actions to reduce their user's privacy.