And I don't, but some people are more or less forced to use either Google or Microsoft products by their employers. I really wish the solution was as simple as that.
If I remember correctly you were also tracking logged out users. Are you still doing that or how do I opt out if I don't have an account? Do I have to install Chrome?
Everything below is my opinion, or information to the best of my personal knowledge. I don't speak for Google.
That lawsuit alleges that Google was tracking people (with analytics) during incognito mode, which is different from opting out of ad personalization. See https://news.ycombinator.com/item?id=23552967 for HN discussion on the topic.
Turning off ad personalization doesn't turn off tracking; it just prevents that data from being used in ads. If you want to turn off data collection altogether (for your Google account) you can manage activity altogether https://myactivity.google.com/activitycontrols. (I don't know whether this affects analytics; I assume it does, though.)
If you want to disable analytics tracking when you're logged out, you can install another extension (https://tools.google.com/dlpage/gaoptout) or just install a content blocker like uBlock Origin that blocks the analytics.js/gtag.js scripts altogether.
Though I do agree with your logic. Google won't need your login info to profile you any more than Facebook does.
Your browser FP (such as hardware device info), IP address, frequent search terms (browsing habits) and distinct pattern will be sufficient enough to identify you without logging in. Metadata is everything in locking down targets.
https://adssettings.google.com/authenticated?hl=en
I have it off for both my personal and Google corporate accounts. (Disclaimer: I work at Google.)
If you don't want to be signed in at all, you can install a Chrome extension.
https://chrome.google.com/webstore/detail/iba-opt-out-by-goo...