You can wipe the device and reinstall whatever at any time. You have complete control of the device. You choose to lock certain things when using GrapheneOS.

You can wipe the device and reinstall whatever at any time. You have complete control of the device. You choose to lock certain things when using GrapheneOS. That’s their security model. If you want to argue that, go study it and argue that. If your threat model is different, if your desired security model is different, then: it’s not for you, use one of many other options. Like all software projects, it doesn’t necessarily exist for you - or anyone specifically. It’s not harming you for it to exist.