A web tool? Why would anyone install a web tool for controlling their kernel’s settings?

Of course Android is not just that and I never claimed that. Are we talking about the security of the kernel or the whole OS? If you deem the kernel used in GrapheneOS to be sufficient for you, I’m assuming that it is the rest of the OS that concerns you. What in particular do you find to be good in GrapheneOS that SELinux with AppArmor and a trusted userland doesn’t achieve?

GrapheneOS is just Android and (as far as i know) all Android versions use SELinux. Why not just use a basic distribution like Arch with SELinux?

That srticle does not claim PGP to be insecure.