Well that was the original android phone idea. Get a hackable open device that you can write apps for your self. Even attach third party hardware to it for extra functionality with lots of customisation. But this idea has mutated quite a bit.
I fully agree with it. But I think Google also understands that the platform is unatractive for businesses. In my case I just don't do Android app because I know it is easy to just take and hack. It is not the case on iPhone. And my app is one time payment so the ability to just copy out the APK leaves me not doing an app at all...
Even by 2015 the noise in Google was “the Chrome OS model is better” with reference to them centrally controlling everything.
Andy Rubin was no saint, on so many levels, but when he was removed from Android leadership and the Chrome culture effectively took over this was always how it was going to go.