[deleted] one of my main arguments is that while say Google has all the resources to focus on making the full OS they don't have ALL the resources as in the most skilled/technical people in every sphere of technology, they have many, but not all of them want to work at Google.
This fact is demonstrated by Google/AOSP relying just as heavily on those niche focused individuals competent enough to contribute to it upstream.
Our lead developer has made numerous contributions that have landed upstream benefitting every Android user from AOSP to other OEMs. Android as a whole is made stronger only thanks to projects such as GrapheneOS and where OEM flavoured Android distributions have to take a middle road between their corporate objectives and our security/privacy, GrapheneOS does not, our security/privacy is the ONLY focus.