Google incentivized the OEMs to do that. Amazon could have incentivized OEMs to do that also, but the business plan that Amazon pursued did not involve third parties building their own Kindle devices.

> Or we can look at why Google's Play Store is allowed to auto-update apps without user interaction, and... that's it.

This has never been true for Android in general. This hasn't been true for phones that only ship with the Play Store since Android 12, which I credit Epic for.