> without being tied to Google
That's a contradiction.
You must be thinking of the Google Play Services but these aren't required by GrapheneOS.
Now if GrapheneOS was its own thing without additional AOSP code updates.
Hence why these efforts should not rely on US institutions good will in first place.
Nobody said that, so you're arguing with the strawman.
The OS offering actual freedom is GNU/Linux.
8 out of the top 10 Android manufacturers are Chinese.
Google would just lose the ownership of Android to a Chinese consortium used by everybody else.
I wonder if you forgot that or you're too young to remember what kind of bizarre hell mobile development was at that time.
Heck, even early Android was really hard to develop for because CTS suite didn't cover enough and all of us spent hours upon hours (and many dollars) trying to reproduce and fix Samsung, Huawei, HTC and other bugs.
8 of the top 10 manufacturers are Chinese, the last two are Samsung (which definitely isn't going to side with Google) ... and Google themselves.
If Google doesn't publish AOSP anymore, Pixels will be the only phone with their software on it, Samsung might attempt something alone and the rest will pick up the development from a Chinese government consortium which will be the de-facto default mobile platform instead of the Google one.
Hopefully that can change, in the future
Every Android ROM is critically dependant on Googles work to actually develop and secure the OS.