That's not really true at all. Almost everyone uses Google-controlled email addresses, so even if I don't, Google still gets our entire conversations. There's n

That's not really true at all. Almost everyone uses Google-controlled email addresses, so even if I don't, Google still gets our entire conversations. There's no option to avoid that except just refusing to email almost everyone. You also don't really "choose" to give your data through Google Analytics. You can block it, but that's a lot different than choosing to give it in the first place. Even if you do block it, that's still only client-side and it's possible that the site is sending data through other methods that you can't control. And like I mentioned in another comment already, what about sites that are hosted on GCP, sites that make requests to other sites that are hosted on GCP, Google network infrastructure, etc.? You get a choice about some of it, but certainly nowhere near all of it.