I was just about to write this but I don't necessarily think it's that far off.
With signed exchanges, AMP pages have the ability to hide the fact you're accessing content through Google [1]. In 2016 Google wrote about testing 'mobile-first indexing' because more people are using mobile devices than desktop browsers [2].
[1] https://developers.google.com/search/docs/guides/about-amp#a... [2] https://webmasters.googleblog.com/2016/11/mobile-first-index...
If Google can control the URL narrative (keeping users from bouncing off AMP pages) it's just one more ability for them to be MITM.
Also nice to see DigiCert helping them out, but I’m not surprised with how DigiCert’s product lineup isn’t much more than a test of how much of a sucker you are.