On this subject https://myaccount.google.com/purchases Turning off all of the controls under myactivity won't stop Google from scanning your emails to track any purchases you make. The only way to stop that is to switch off of Gmail.
This is what finally prompted me to move to Fastmail after being on G Suite since 2007. Even though I have to pay for Fastmail and was grandfathered into free on G Suite. Pretty happy with it so far. Now going through the process of reducing all the places I use Google services. Moved my personal stuff from GCP to Digital Ocean. Gmail to Fastmail. Chrome to Firefox / Safari. Currently seeing if Zoho is a good substit…
I find this feature insanely useful. Google is doing something useful with my email. I learn about delayed flights way way in advance of anyone else as a result.
So let's just be clear here: - you get an email, to you, privately - gmail used to offer making a calendar for certain keywords in an email - google will now automatically do said calendar entries - on your PRIVATE calendar btw - google will also combine real-time flight info with your flight info, and tell you useful things via PRIVATE push notifications to you only.
This whole thing is the culmination of years of singularity "the computer will expand the mind" rhetoric. It's totally privacy protecting - the calendar entries, push notifications are private.
This is what everyone has been trying to build for years. We are here. And all of a sudden it's creepy? Because they notified you a dozen times, via email they were going to do this, and you ignored it?
Email has been turned into a useful automatically actionable system. My family forwards their itineraries and I don't have do anything else, it's automatically calendared. That's probably the only reason I pick them up from the airport frankly.