In the era of anti tracking, Amazon doesn’t need to worry about it. It’s knows what consumer preferences based on “revealed preferences” - what people buy. It’s a “strategy credit”.
Amazon also created its own line of devices and its own fork of Android and replaces Google Play Services APIs with its own. But how many applications are successful distributing only on Amazon’s Android store? How many western developers are going to bypass Google Play Store?
And yes there has been security vulnerabilities caused by bypassing the Google Play Store by a little company I am sure you have heard of.
https://www.google.com/amp/s/www.cnet.com/google-amp/news/fo...
But Google or Android is not exactly a model of protecting users privacy.
https://www.theverge.com/2019/1/30/18204064/apple-google-mon...