The accusations are certainly well known (https://en.m.wikipedia.org/wiki/Privacy_concerns_regarding_G...).
Whether anything here constitutes misuse is a matter of both personal opinion (yours being very well known of course given your thoughts and comments about Google) as well as various laws but that doesn't make any of it a universally accepted truth or standard.
In my case I'm much more worried about security than privacy, and far more willing to trade off the privacy (more targeted ads) for the increased security - Google's infrastructure is way more likely to be properly secured vs. Joe Random wearables startup, or even Garmin, as a recent example...
[0] https://www.washingtonpost.com/technology/2020/07/31/google-...
See https://www.androidauthority.com/blue-mail-play-store-114347...
This is called an "oops". Mozilla is well aware of how Google "accidentally" harms other companies repeatedly to gain an advantage: https://www.zdnet.com/article/former-mozilla-exec-google-has...
There are economies of scale to security just like with anything else.
Paranoia claims suggest unfounded concerns but Google's misuse of private information is well known.