They just haven't seen these masterpieces.
https://www.youtube.com/watch?v=4zH9Zca1vRMJust kidding, they don't care, unfortunately.
Also, GrapheneOS is an important step for solving it, but it's still not a solution to absolutely everything: any chip we have in the phones could be a malicious black box that has too much access to sensitive data (including so-called Trusted Executed Environments themselves; they could be used as honeyspots).